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Finding the Fourth Proportional to 85,344.80, 128,017.20 and 29,946.40

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Solution

The fourth proportional to 85,344.80, 128,017.20 and 29,946.40 is: 44,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,344.80 : 128,017.20 = 29,946.40 : x
  2. Step 2: Convert to fraction form
    85,344.80/128,017.20 = 29,946.40/x
  3. Step 3: Cross multiply
    85,344.80x = 128,017.20 × 29,946.40
  4. Step 4: Simplify right side
    85,344.80x = 3,833,654,278.08
  5. Step 5: Solve for x
    x = 3,833,654,278.08/85,344.80
  6. Step 6: Final answer
    x = 44,919.60

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Similar ratio
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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.