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Finding the Fourth Proportional to 133,129.92, 183,718.36 and 72,700.57

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Solution

The fourth proportional to 133,129.92, 183,718.36 and 72,700.57 is: 100,326.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,129.92 : 183,718.36 = 72,700.57 : x
  2. Step 2: Convert to fraction form
    133,129.92/183,718.36 = 72,700.57/x
  3. Step 3: Cross multiply
    133,129.92x = 183,718.36 × 72,700.57
  4. Step 4: Simplify right side
    133,129.92x = 13,356,429,491.47
  5. Step 5: Solve for x
    x = 13,356,429,491.47/133,129.92
  6. Step 6: Final answer
    x = 100,326.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.