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Finding the Fourth Proportional to 122,370.48, 168,865.56 and 72,059.76

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Solution

The fourth proportional to 122,370.48, 168,865.56 and 72,059.76 is: 99,439.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,370.48 : 168,865.56 = 72,059.76 : x
  2. Step 2: Convert to fraction form
    122,370.48/168,865.56 = 72,059.76/x
  3. Step 3: Cross multiply
    122,370.48x = 168,865.56 × 72,059.76
  4. Step 4: Simplify right side
    122,370.48x = 12,168,411,725.87
  5. Step 5: Solve for x
    x = 12,168,411,725.87/122,370.48
  6. Step 6: Final answer
    x = 99,439.11

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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.