Home / 142,780.06-197,034.12-78,248.80

Finding the Fourth Proportional to 142,780.06, 197,034.12 and 78,248.80

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Solution

The fourth proportional to 142,780.06, 197,034.12 and 78,248.80 is: 107,982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,780.06 : 197,034.12 = 78,248.80 : x
  2. Step 2: Convert to fraction form
    142,780.06/197,034.12 = 78,248.80/x
  3. Step 3: Cross multiply
    142,780.06x = 197,034.12 × 78,248.80
  4. Step 4: Simplify right side
    142,780.06x = 15,417,683,449.06
  5. Step 5: Solve for x
    x = 15,417,683,449.06/142,780.06
  6. Step 6: Final answer
    x = 107,982.05

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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.