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Finding the Fourth Proportional to 138,403, 207,619.08 and 63,510.40

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Solution

The fourth proportional to 138,403, 207,619.08 and 63,510.40 is: 95,272.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403 : 207,619.08 = 63,510.40 : x
  2. Step 2: Convert to fraction form
    138,403/207,619.08 = 63,510.40/x
  3. Step 3: Cross multiply
    138,403x = 207,619.08 × 63,510.40
  4. Step 4: Simplify right side
    138,403x = 13,185,970,818.43
  5. Step 5: Solve for x
    x = 13,185,970,818.43/138,403
  6. Step 6: Final answer
    x = 95,272.29

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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.