Home / 87,085.60-130,628.40-40,429.60

Finding the Fourth Proportional to 87,085.60, 130,628.40 and 40,429.60

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Solution

The fourth proportional to 87,085.60, 130,628.40 and 40,429.60 is: 60,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,085.60 : 130,628.40 = 40,429.60 : x
  2. Step 2: Convert to fraction form
    87,085.60/130,628.40 = 40,429.60/x
  3. Step 3: Cross multiply
    87,085.60x = 130,628.40 × 40,429.60
  4. Step 4: Simplify right side
    87,085.60x = 5,281,253,960.64
  5. Step 5: Solve for x
    x = 5,281,253,960.64/87,085.60
  6. Step 6: Final answer
    x = 60,644.40

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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.