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Finding the Fourth Proportional to 138,703.86, 208,055.79 and 88,807.46

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Solution

The fourth proportional to 138,703.86, 208,055.79 and 88,807.46 is: 133,211.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,703.86 : 208,055.79 = 88,807.46 : x
  2. Step 2: Convert to fraction form
    138,703.86/208,055.79 = 88,807.46/x
  3. Step 3: Cross multiply
    138,703.86x = 208,055.79 × 88,807.46
  4. Step 4: Simplify right side
    138,703.86x = 18,476,905,207.91
  5. Step 5: Solve for x
    x = 18,476,905,207.91/138,703.86
  6. Step 6: Final answer
    x = 133,211.18

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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.