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Finding the Fourth Proportional to 85,990.91, 129,158.27 and 51,864.90

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Solution

The fourth proportional to 85,990.91, 129,158.27 and 51,864.90 is: 77,901.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.91 : 129,158.27 = 51,864.90 : x
  2. Step 2: Convert to fraction form
    85,990.91/129,158.27 = 51,864.90/x
  3. Step 3: Cross multiply
    85,990.91x = 129,158.27 × 51,864.90
  4. Step 4: Simplify right side
    85,990.91x = 6,698,780,498.40
  5. Step 5: Solve for x
    x = 6,698,780,498.40/85,990.91
  6. Step 6: Final answer
    x = 77,901.03

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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.