Home / 87,345.36-120,537-49,621.68

Finding the Fourth Proportional to 87,345.36, 120,537 and 49,621.68

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Solution

The fourth proportional to 87,345.36, 120,537 and 49,621.68 is: 68,478.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,345.36 : 120,537 = 49,621.68 : x
  2. Step 2: Convert to fraction form
    87,345.36/120,537 = 49,621.68/x
  3. Step 3: Cross multiply
    87,345.36x = 120,537 × 49,621.68
  4. Step 4: Simplify right side
    87,345.36x = 5,981,248,442.16
  5. Step 5: Solve for x
    x = 5,981,248,442.16/87,345.36
  6. Step 6: Final answer
    x = 68,478.15

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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.