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Finding the Fourth Proportional to 87,061, 120,155.52 and 51,254.32

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Solution

The fourth proportional to 87,061, 120,155.52 and 51,254.32 is: 70,737.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,061 : 120,155.52 = 51,254.32 : x
  2. Step 2: Convert to fraction form
    87,061/120,155.52 = 51,254.32/x
  3. Step 3: Cross multiply
    87,061x = 120,155.52 × 51,254.32
  4. Step 4: Simplify right side
    87,061x = 6,158,489,471.85
  5. Step 5: Solve for x
    x = 6,158,489,471.85/87,061
  6. Step 6: Final answer
    x = 70,737.64

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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.