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Finding the Fourth Proportional to 170,752.87, 255,913.98 and 86,534.20

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Solution

The fourth proportional to 170,752.87, 255,913.98 and 86,534.20 is: 129,692.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,752.87 : 255,913.98 = 86,534.20 : x
  2. Step 2: Convert to fraction form
    170,752.87/255,913.98 = 86,534.20/x
  3. Step 3: Cross multiply
    170,752.87x = 255,913.98 × 86,534.20
  4. Step 4: Simplify right side
    170,752.87x = 22,145,311,528.12
  5. Step 5: Solve for x
    x = 22,145,311,528.12/170,752.87
  6. Step 6: Final answer
    x = 129,692.18

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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.