Home / 87,345.60-131,018.40-40,689.60

Finding the Fourth Proportional to 87,345.60, 131,018.40 and 40,689.60

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Solution

The fourth proportional to 87,345.60, 131,018.40 and 40,689.60 is: 61,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,345.60 : 131,018.40 = 40,689.60 : x
  2. Step 2: Convert to fraction form
    87,345.60/131,018.40 = 40,689.60/x
  3. Step 3: Cross multiply
    87,345.60x = 131,018.40 × 40,689.60
  4. Step 4: Simplify right side
    87,345.60x = 5,331,086,288.64
  5. Step 5: Solve for x
    x = 5,331,086,288.64/87,345.60
  6. Step 6: Final answer
    x = 61,034.40

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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.