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Finding the Fourth Proportional to 86,185,556.80, 129,278,335.20 and 86,185,556.80

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Solution

The fourth proportional to 86,185,556.80, 129,278,335.20 and 86,185,556.80 is: 129,278,335.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,185,556.80 : 129,278,335.20 = 86,185,556.80 : x
  2. Step 2: Convert to fraction form
    86,185,556.80/129,278,335.20 = 86,185,556.80/x
  3. Step 3: Cross multiply
    86,185,556.80x = 129,278,335.20 × 86,185,556.80
  4. Step 4: Simplify right side
    86,185,556.80x = 11,141,925,301,389,040
  5. Step 5: Solve for x
    x = 11,141,925,301,389,040/86,185,556.80
  6. Step 6: Final answer
    x = 129,278,335.20

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.