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Finding the Fourth Proportional to 124,692.60, 172,074.70 and 68,102.76

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Solution

The fourth proportional to 124,692.60, 172,074.70 and 68,102.76 is: 93,981.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,692.60 : 172,074.70 = 68,102.76 : x
  2. Step 2: Convert to fraction form
    124,692.60/172,074.70 = 68,102.76/x
  3. Step 3: Cross multiply
    124,692.60x = 172,074.70 × 68,102.76
  4. Step 4: Simplify right side
    124,692.60x = 11,718,761,996.17
  5. Step 5: Solve for x
    x = 11,718,761,996.17/124,692.60
  6. Step 6: Final answer
    x = 93,981.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.