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Finding the Fourth Proportional to 138,875.66, 208,904.80 and 125,884.90

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Solution

The fourth proportional to 138,875.66, 208,904.80 and 125,884.90 is: 189,363.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,875.66 : 208,904.80 = 125,884.90 : x
  2. Step 2: Convert to fraction form
    138,875.66/208,904.80 = 125,884.90/x
  3. Step 3: Cross multiply
    138,875.66x = 208,904.80 × 125,884.90
  4. Step 4: Simplify right side
    138,875.66x = 26,297,959,857.52
  5. Step 5: Solve for x
    x = 26,297,959,857.52/138,875.66
  6. Step 6: Final answer
    x = 189,363.35

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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.