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Finding the Fourth Proportional to 87,357.60, 131,036.40 and 85,899.60

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Solution

The fourth proportional to 87,357.60, 131,036.40 and 85,899.60 is: 128,849.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,357.60 : 131,036.40 = 85,899.60 : x
  2. Step 2: Convert to fraction form
    87,357.60/131,036.40 = 85,899.60/x
  3. Step 3: Cross multiply
    87,357.60x = 131,036.40 × 85,899.60
  4. Step 4: Simplify right side
    87,357.60x = 11,255,974,345.44
  5. Step 5: Solve for x
    x = 11,255,974,345.44/87,357.60
  6. Step 6: Final answer
    x = 128,849.40

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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.