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Finding the Fourth Proportional to 122,916.59, 169,630.64 and 74,520.03

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Solution

The fourth proportional to 122,916.59, 169,630.64 and 74,520.03 is: 102,841.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,916.59 : 169,630.64 = 74,520.03 : x
  2. Step 2: Convert to fraction form
    122,916.59/169,630.64 = 74,520.03/x
  3. Step 3: Cross multiply
    122,916.59x = 169,630.64 × 74,520.03
  4. Step 4: Simplify right side
    122,916.59x = 12,640,879,830.79
  5. Step 5: Solve for x
    x = 12,640,879,830.79/122,916.59
  6. Step 6: Final answer
    x = 102,841.12

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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.