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Finding the Fourth Proportional to 138,606.60, 208,007.10 and 88,807.80

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Solution

The fourth proportional to 138,606.60, 208,007.10 and 88,807.80 is: 133,273.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,606.60 : 208,007.10 = 88,807.80 : x
  2. Step 2: Convert to fraction form
    138,606.60/208,007.10 = 88,807.80/x
  3. Step 3: Cross multiply
    138,606.60x = 208,007.10 × 88,807.80
  4. Step 4: Simplify right side
    138,606.60x = 18,472,652,935.38
  5. Step 5: Solve for x
    x = 18,472,652,935.38/138,606.60
  6. Step 6: Final answer
    x = 133,273.98

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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.