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Finding the Fourth Proportional to 92,301.45, 138,359.94 and 79,599.78

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Solution

The fourth proportional to 92,301.45, 138,359.94 and 79,599.78 is: 119,320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,301.45 : 138,359.94 = 79,599.78 : x
  2. Step 2: Convert to fraction form
    92,301.45/138,359.94 = 79,599.78/x
  3. Step 3: Cross multiply
    92,301.45x = 138,359.94 × 79,599.78
  4. Step 4: Simplify right side
    92,301.45x = 11,013,420,784.81
  5. Step 5: Solve for x
    x = 11,013,420,784.81/92,301.45
  6. Step 6: Final answer
    x = 119,320.13

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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.