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Finding the Fourth Proportional to 122,581.14, 169,168.83 and 74,820.78

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Solution

The fourth proportional to 122,581.14, 169,168.83 and 74,820.78 is: 103,256.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,581.14 : 169,168.83 = 74,820.78 : x
  2. Step 2: Convert to fraction form
    122,581.14/169,168.83 = 74,820.78/x
  3. Step 3: Cross multiply
    122,581.14x = 169,168.83 × 74,820.78
  4. Step 4: Simplify right side
    122,581.14x = 12,657,343,812.29
  5. Step 5: Solve for x
    x = 12,657,343,812.29/122,581.14
  6. Step 6: Final answer
    x = 103,256.86

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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.