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Finding the Fourth Proportional to 138,071.94, 207,108.45 and 42,010.11

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Solution

The fourth proportional to 138,071.94, 207,108.45 and 42,010.11 is: 63,015.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,071.94 : 207,108.45 = 42,010.11 : x
  2. Step 2: Convert to fraction form
    138,071.94/207,108.45 = 42,010.11/x
  3. Step 3: Cross multiply
    138,071.94x = 207,108.45 × 42,010.11
  4. Step 4: Simplify right side
    138,071.94x = 8,700,648,766.43
  5. Step 5: Solve for x
    x = 8,700,648,766.43/138,071.94
  6. Step 6: Final answer
    x = 63,015.33

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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.