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Finding the Fourth Proportional to 138,753.16, 208,151.40 and 45,237.16

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Solution

The fourth proportional to 138,753.16, 208,151.40 and 45,237.16 is: 67,862.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,753.16 : 208,151.40 = 45,237.16 : x
  2. Step 2: Convert to fraction form
    138,753.16/208,151.40 = 45,237.16/x
  3. Step 3: Cross multiply
    138,753.16x = 208,151.40 × 45,237.16
  4. Step 4: Simplify right side
    138,753.16x = 9,416,178,186.02
  5. Step 5: Solve for x
    x = 9,416,178,186.02/138,753.16
  6. Step 6: Final answer
    x = 67,862.80

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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.