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Finding the Fourth Proportional to 122,440.96, 168,948.48 and 72,133.12

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Solution

The fourth proportional to 122,440.96, 168,948.48 and 72,133.12 is: 99,531.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,440.96 : 168,948.48 = 72,133.12 : x
  2. Step 2: Convert to fraction form
    122,440.96/168,948.48 = 72,133.12/x
  3. Step 3: Cross multiply
    122,440.96x = 168,948.48 × 72,133.12
  4. Step 4: Simplify right side
    122,440.96x = 12,186,780,981.66
  5. Step 5: Solve for x
    x = 12,186,780,981.66/122,440.96
  6. Step 6: Final answer
    x = 99,531.90

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1.5x scale

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.