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Finding the Fourth Proportional to 122,401.60, 183,710.40 and 72,419.20

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Solution

The fourth proportional to 122,401.60, 183,710.40 and 72,419.20 is: 108,692.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,401.60 : 183,710.40 = 72,419.20 : x
  2. Step 2: Convert to fraction form
    122,401.60/183,710.40 = 72,419.20/x
  3. Step 3: Cross multiply
    122,401.60x = 183,710.40 × 72,419.20
  4. Step 4: Simplify right side
    122,401.60x = 13,304,160,199.68
  5. Step 5: Solve for x
    x = 13,304,160,199.68/122,401.60
  6. Step 6: Final answer
    x = 108,692.70

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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.