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Finding the Fourth Proportional to 99,520, 137,342.04 and 58,685.77

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Solution

The fourth proportional to 99,520, 137,342.04 and 58,685.77 is: 80,988.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,520 : 137,342.04 = 58,685.77 : x
  2. Step 2: Convert to fraction form
    99,520/137,342.04 = 58,685.77/x
  3. Step 3: Cross multiply
    99,520x = 137,342.04 × 58,685.77
  4. Step 4: Simplify right side
    99,520x = 8,060,023,370.77
  5. Step 5: Solve for x
    x = 8,060,023,370.77/99,520
  6. Step 6: Final answer
    x = 80,988.98

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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.