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Finding the Fourth Proportional to 122,159.40, 168,581.86 and 74,414.76

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Solution

The fourth proportional to 122,159.40, 168,581.86 and 74,414.76 is: 102,693.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,159.40 : 168,581.86 = 74,414.76 : x
  2. Step 2: Convert to fraction form
    122,159.40/168,581.86 = 74,414.76/x
  3. Step 3: Cross multiply
    122,159.40x = 168,581.86 × 74,414.76
  4. Step 4: Simplify right side
    122,159.40x = 12,544,978,652.25
  5. Step 5: Solve for x
    x = 12,544,978,652.25/122,159.40
  6. Step 6: Final answer
    x = 102,693.52

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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.