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Finding the Fourth Proportional to 85,625.60, 128,438.40 and 22,445.60

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Solution

The fourth proportional to 85,625.60, 128,438.40 and 22,445.60 is: 33,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,625.60 : 128,438.40 = 22,445.60 : x
  2. Step 2: Convert to fraction form
    85,625.60/128,438.40 = 22,445.60/x
  3. Step 3: Cross multiply
    85,625.60x = 128,438.40 × 22,445.60
  4. Step 4: Simplify right side
    85,625.60x = 2,882,876,951.04
  5. Step 5: Solve for x
    x = 2,882,876,951.04/85,625.60
  6. Step 6: Final answer
    x = 33,668.40

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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.