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Finding the Fourth Proportional to 86,128.92, 129,040.56 and 73,522.44

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Solution

The fourth proportional to 86,128.92, 129,040.56 and 73,522.44 is: 110,153.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,128.92 : 129,040.56 = 73,522.44 : x
  2. Step 2: Convert to fraction form
    86,128.92/129,040.56 = 73,522.44/x
  3. Step 3: Cross multiply
    86,128.92x = 129,040.56 × 73,522.44
  4. Step 4: Simplify right side
    86,128.92x = 9,487,376,830.17
  5. Step 5: Solve for x
    x = 9,487,376,830.17/86,128.92
  6. Step 6: Final answer
    x = 110,153.21

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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.