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Finding the Fourth Proportional to 103,042.70, 142,074.50 and 80,079.20

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Solution

The fourth proportional to 103,042.70, 142,074.50 and 80,079.20 is: 110,412.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,042.70 : 142,074.50 = 80,079.20 : x
  2. Step 2: Convert to fraction form
    103,042.70/142,074.50 = 80,079.20/x
  3. Step 3: Cross multiply
    103,042.70x = 142,074.50 × 80,079.20
  4. Step 4: Simplify right side
    103,042.70x = 11,377,211,189.63
  5. Step 5: Solve for x
    x = 11,377,211,189.63/103,042.70
  6. Step 6: Final answer
    x = 110,412.59

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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.