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Finding the Fourth Proportional to 121,871.10, 182,732.82 and 79,700.28

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Solution

The fourth proportional to 121,871.10, 182,732.82 and 79,700.28 is: 119,502.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,871.10 : 182,732.82 = 79,700.28 : x
  2. Step 2: Convert to fraction form
    121,871.10/182,732.82 = 79,700.28/x
  3. Step 3: Cross multiply
    121,871.10x = 182,732.82 × 79,700.28
  4. Step 4: Simplify right side
    121,871.10x = 14,563,856,919.19
  5. Step 5: Solve for x
    x = 14,563,856,919.19/121,871.10
  6. Step 6: Final answer
    x = 119,502.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.