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Finding the Fourth Proportional to 122,730.87, 169,324.71 and 71,725.47

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Solution

The fourth proportional to 122,730.87, 169,324.71 and 71,725.47 is: 98,955.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,730.87 : 169,324.71 = 71,725.47 : x
  2. Step 2: Convert to fraction form
    122,730.87/169,324.71 = 71,725.47/x
  3. Step 3: Cross multiply
    122,730.87x = 169,324.71 × 71,725.47
  4. Step 4: Simplify right side
    122,730.87x = 12,144,894,407.36
  5. Step 5: Solve for x
    x = 12,144,894,407.36/122,730.87
  6. Step 6: Final answer
    x = 98,955.50

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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.