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Finding the Fourth Proportional to 136,607.60, 204,692.70 and 86,598.20

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Solution

The fourth proportional to 136,607.60, 204,692.70 and 86,598.20 is: 129,758.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,607.60 : 204,692.70 = 86,598.20 : x
  2. Step 2: Convert to fraction form
    136,607.60/204,692.70 = 86,598.20/x
  3. Step 3: Cross multiply
    136,607.60x = 204,692.70 × 86,598.20
  4. Step 4: Simplify right side
    136,607.60x = 17,726,019,373.14
  5. Step 5: Solve for x
    x = 17,726,019,373.14/136,607.60
  6. Step 6: Final answer
    x = 129,758.66

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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.