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Finding the Fourth Proportional to 101,279.90, 139,737.82 and 58,257.15

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Solution

The fourth proportional to 101,279.90, 139,737.82 and 58,257.15 is: 80,378.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,279.90 : 139,737.82 = 58,257.15 : x
  2. Step 2: Convert to fraction form
    101,279.90/139,737.82 = 58,257.15/x
  3. Step 3: Cross multiply
    101,279.90x = 139,737.82 × 58,257.15
  4. Step 4: Simplify right side
    101,279.90x = 8,140,727,140.41
  5. Step 5: Solve for x
    x = 8,140,727,140.41/101,279.90
  6. Step 6: Final answer
    x = 80,378.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.