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Finding the Fourth Proportional to 86,394.69, 129,663.32 and 66,792.69

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Solution

The fourth proportional to 86,394.69, 129,663.32 and 66,792.69 is: 100,244.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,394.69 : 129,663.32 = 66,792.69 : x
  2. Step 2: Convert to fraction form
    86,394.69/129,663.32 = 66,792.69/x
  3. Step 3: Cross multiply
    86,394.69x = 129,663.32 × 66,792.69
  4. Step 4: Simplify right side
    86,394.69x = 8,660,561,603.17
  5. Step 5: Solve for x
    x = 8,660,561,603.17/86,394.69
  6. Step 6: Final answer
    x = 100,244.14

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1.5x scale

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.