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Finding the Fourth Proportional to 87,155.88, 120,285.18 and 49,437

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Solution

The fourth proportional to 87,155.88, 120,285.18 and 49,437 is: 68,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,155.88 : 120,285.18 = 49,437 : x
  2. Step 2: Convert to fraction form
    87,155.88/120,285.18 = 49,437/x
  3. Step 3: Cross multiply
    87,155.88x = 120,285.18 × 49,437
  4. Step 4: Simplify right side
    87,155.88x = 5,946,538,443.66
  5. Step 5: Solve for x
    x = 5,946,538,443.66/87,155.88
  6. Step 6: Final answer
    x = 68,228.77

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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.