Home / 86,747.60-130,121.40-21,083.60

Finding the Fourth Proportional to 86,747.60, 130,121.40 and 21,083.60

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Solution

The fourth proportional to 86,747.60, 130,121.40 and 21,083.60 is: 31,625.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,747.60 : 130,121.40 = 21,083.60 : x
  2. Step 2: Convert to fraction form
    86,747.60/130,121.40 = 21,083.60/x
  3. Step 3: Cross multiply
    86,747.60x = 130,121.40 × 21,083.60
  4. Step 4: Simplify right side
    86,747.60x = 2,743,427,549.04
  5. Step 5: Solve for x
    x = 2,743,427,549.04/86,747.60
  6. Step 6: Final answer
    x = 31,625.40

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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.