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Finding the Fourth Proportional to 122,841.55, 169,613.76 and 120,879.79

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Solution

The fourth proportional to 122,841.55, 169,613.76 and 120,879.79 is: 166,905.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,841.55 : 169,613.76 = 120,879.79 : x
  2. Step 2: Convert to fraction form
    122,841.55/169,613.76 = 120,879.79/x
  3. Step 3: Cross multiply
    122,841.55x = 169,613.76 × 120,879.79
  4. Step 4: Simplify right side
    122,841.55x = 20,502,875,689.91
  5. Step 5: Solve for x
    x = 20,502,875,689.91/122,841.55
  6. Step 6: Final answer
    x = 166,905.06

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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.