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Finding the Fourth Proportional to 86,498.40, 129,747.60 and 56,949.60

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Solution

The fourth proportional to 86,498.40, 129,747.60 and 56,949.60 is: 85,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,498.40 : 129,747.60 = 56,949.60 : x
  2. Step 2: Convert to fraction form
    86,498.40/129,747.60 = 56,949.60/x
  3. Step 3: Cross multiply
    86,498.40x = 129,747.60 × 56,949.60
  4. Step 4: Simplify right side
    86,498.40x = 7,389,073,920.96
  5. Step 5: Solve for x
    x = 7,389,073,920.96/86,498.40
  6. Step 6: Final answer
    x = 85,424.40

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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.