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Finding the Fourth Proportional to 92,792.40, 138,972.06 and 67,770.51

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Solution

The fourth proportional to 92,792.40, 138,972.06 and 67,770.51 is: 101,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,792.40 : 138,972.06 = 67,770.51 : x
  2. Step 2: Convert to fraction form
    92,792.40/138,972.06 = 67,770.51/x
  3. Step 3: Cross multiply
    92,792.40x = 138,972.06 × 67,770.51
  4. Step 4: Simplify right side
    92,792.40x = 9,418,207,381.95
  5. Step 5: Solve for x
    x = 9,418,207,381.95/92,792.40
  6. Step 6: Final answer
    x = 101,497.62

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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.