Home / 86,390.13-129,980.48-51,356.01

Finding the Fourth Proportional to 86,390.13, 129,980.48 and 51,356.01

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Solution

The fourth proportional to 86,390.13, 129,980.48 and 51,356.01 is: 77,269.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.13 : 129,980.48 = 51,356.01 : x
  2. Step 2: Convert to fraction form
    86,390.13/129,980.48 = 51,356.01/x
  3. Step 3: Cross multiply
    86,390.13x = 129,980.48 × 51,356.01
  4. Step 4: Simplify right side
    86,390.13x = 6,675,278,573.90
  5. Step 5: Solve for x
    x = 6,675,278,573.90/86,390.13
  6. Step 6: Final answer
    x = 77,269.00

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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.