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Finding the Fourth Proportional to 139,937.88, 209,803.14 and 84,520.92

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Solution

The fourth proportional to 139,937.88, 209,803.14 and 84,520.92 is: 126,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,937.88 : 209,803.14 = 84,520.92 : x
  2. Step 2: Convert to fraction form
    139,937.88/209,803.14 = 84,520.92/x
  3. Step 3: Cross multiply
    139,937.88x = 209,803.14 × 84,520.92
  4. Step 4: Simplify right side
    139,937.88x = 17,732,754,411.69
  5. Step 5: Solve for x
    x = 17,732,754,411.69/139,937.88
  6. Step 6: Final answer
    x = 126,718.76

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1.5x scale

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.