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Finding the Fourth Proportional to 137,990.67, 206,985.60 and 38,150.61

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Solution

The fourth proportional to 137,990.67, 206,985.60 and 38,150.61 is: 57,225.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,990.67 : 206,985.60 = 38,150.61 : x
  2. Step 2: Convert to fraction form
    137,990.67/206,985.60 = 38,150.61/x
  3. Step 3: Cross multiply
    137,990.67x = 206,985.60 × 38,150.61
  4. Step 4: Simplify right side
    137,990.67x = 7,896,626,901.22
  5. Step 5: Solve for x
    x = 7,896,626,901.22/137,990.67
  6. Step 6: Final answer
    x = 57,225.80

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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.