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Finding the Fourth Proportional to 86,673.90, 129,792.15 and 69,177.90

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Solution

The fourth proportional to 86,673.90, 129,792.15 and 69,177.90 is: 103,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,673.90 : 129,792.15 = 69,177.90 : x
  2. Step 2: Convert to fraction form
    86,673.90/129,792.15 = 69,177.90/x
  3. Step 3: Cross multiply
    86,673.90x = 129,792.15 × 69,177.90
  4. Step 4: Simplify right side
    86,673.90x = 8,978,748,373.49
  5. Step 5: Solve for x
    x = 8,978,748,373.49/86,673.90
  6. Step 6: Final answer
    x = 103,592.30

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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.