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Finding the Fourth Proportional to 121,871.80, 182,807.70 and 102,626.20

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Solution

The fourth proportional to 121,871.80, 182,807.70 and 102,626.20 is: 153,939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,871.80 : 182,807.70 = 102,626.20 : x
  2. Step 2: Convert to fraction form
    121,871.80/182,807.70 = 102,626.20/x
  3. Step 3: Cross multiply
    121,871.80x = 182,807.70 × 102,626.20
  4. Step 4: Simplify right side
    121,871.80x = 18,760,859,581.74
  5. Step 5: Solve for x
    x = 18,760,859,581.74/121,871.80
  6. Step 6: Final answer
    x = 153,939.30

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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.