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Finding the Fourth Proportional to 101,129.80, 139,586.88 and 58,702

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Solution

The fourth proportional to 101,129.80, 139,586.88 and 58,702 is: 81,024.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,129.80 : 139,586.88 = 58,702 : x
  2. Step 2: Convert to fraction form
    101,129.80/139,586.88 = 58,702/x
  3. Step 3: Cross multiply
    101,129.80x = 139,586.88 × 58,702
  4. Step 4: Simplify right side
    101,129.80x = 8,194,029,029.76
  5. Step 5: Solve for x
    x = 8,194,029,029.76/101,129.80
  6. Step 6: Final answer
    x = 81,024.87

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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.