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Finding the Fourth Proportional to 142,750.80, 197,008.20 and 79,108.56

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Solution

The fourth proportional to 142,750.80, 197,008.20 and 79,108.56 is: 109,176.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,750.80 : 197,008.20 = 79,108.56 : x
  2. Step 2: Convert to fraction form
    142,750.80/197,008.20 = 79,108.56/x
  3. Step 3: Cross multiply
    142,750.80x = 197,008.20 × 79,108.56
  4. Step 4: Simplify right side
    142,750.80x = 15,585,035,010.19
  5. Step 5: Solve for x
    x = 15,585,035,010.19/142,750.80
  6. Step 6: Final answer
    x = 109,176.52

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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.