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Finding the Fourth Proportional to 120,613, 166,444.82 and 66,898.12

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Solution

The fourth proportional to 120,613, 166,444.82 and 66,898.12 is: 92,318.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,613 : 166,444.82 = 66,898.12 : x
  2. Step 2: Convert to fraction form
    120,613/166,444.82 = 66,898.12/x
  3. Step 3: Cross multiply
    120,613x = 166,444.82 × 66,898.12
  4. Step 4: Simplify right side
    120,613x = 11,134,845,541.74
  5. Step 5: Solve for x
    x = 11,134,845,541.74/120,613
  6. Step 6: Final answer
    x = 92,318.78

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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.