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Finding the Fourth Proportional to 139,230.90, 208,921.95 and 59,255.82

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Solution

The fourth proportional to 139,230.90, 208,921.95 and 59,255.82 is: 88,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.90 : 208,921.95 = 59,255.82 : x
  2. Step 2: Convert to fraction form
    139,230.90/208,921.95 = 59,255.82/x
  3. Step 3: Cross multiply
    139,230.90x = 208,921.95 × 59,255.82
  4. Step 4: Simplify right side
    139,230.90x = 12,379,841,463.25
  5. Step 5: Solve for x
    x = 12,379,841,463.25/139,230.90
  6. Step 6: Final answer
    x = 88,915.90

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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.