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Finding the Fourth Proportional to 86,513.70, 129,770.55 and 36,577.20

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Solution

The fourth proportional to 86,513.70, 129,770.55 and 36,577.20 is: 54,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,513.70 : 129,770.55 = 36,577.20 : x
  2. Step 2: Convert to fraction form
    86,513.70/129,770.55 = 36,577.20/x
  3. Step 3: Cross multiply
    86,513.70x = 129,770.55 × 36,577.20
  4. Step 4: Simplify right side
    86,513.70x = 4,746,643,361.46
  5. Step 5: Solve for x
    x = 4,746,643,361.46/86,513.70
  6. Step 6: Final answer
    x = 54,865.80

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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.