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Finding the Fourth Proportional to 87,490.90, 120,737.41 and 47,746.90

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Solution

The fourth proportional to 87,490.90, 120,737.41 and 47,746.90 is: 65,890.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,490.90 : 120,737.41 = 47,746.90 : x
  2. Step 2: Convert to fraction form
    87,490.90/120,737.41 = 47,746.90/x
  3. Step 3: Cross multiply
    87,490.90x = 120,737.41 × 47,746.90
  4. Step 4: Simplify right side
    87,490.90x = 5,764,837,041.53
  5. Step 5: Solve for x
    x = 5,764,837,041.53/87,490.90
  6. Step 6: Final answer
    x = 65,890.70

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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.