Home / 138,730.10-208,192.35-88,931.30

Finding the Fourth Proportional to 138,730.10, 208,192.35 and 88,931.30

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Solution

The fourth proportional to 138,730.10, 208,192.35 and 88,931.30 is: 133,459.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,730.10 : 208,192.35 = 88,931.30 : x
  2. Step 2: Convert to fraction form
    138,730.10/208,192.35 = 88,931.30/x
  3. Step 3: Cross multiply
    138,730.10x = 208,192.35 × 88,931.30
  4. Step 4: Simplify right side
    138,730.10x = 18,514,816,335.56
  5. Step 5: Solve for x
    x = 18,514,816,335.56/138,730.10
  6. Step 6: Final answer
    x = 133,459.26

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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.