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Finding the Fourth Proportional to 138,070.61, 207,108.47 and 43,298.68

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Solution

The fourth proportional to 138,070.61, 207,108.47 and 43,298.68 is: 64,948.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,070.61 : 207,108.47 = 43,298.68 : x
  2. Step 2: Convert to fraction form
    138,070.61/207,108.47 = 43,298.68/x
  3. Step 3: Cross multiply
    138,070.61x = 207,108.47 × 43,298.68
  4. Step 4: Simplify right side
    138,070.61x = 8,967,523,367.82
  5. Step 5: Solve for x
    x = 8,967,523,367.82/138,070.61
  6. Step 6: Final answer
    x = 64,948.82

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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.