Home / 143,437.20-197,948.12-78,909.12

Finding the Fourth Proportional to 143,437.20, 197,948.12 and 78,909.12

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Solution

The fourth proportional to 143,437.20, 197,948.12 and 78,909.12 is: 108,897.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,437.20 : 197,948.12 = 78,909.12 : x
  2. Step 2: Convert to fraction form
    143,437.20/197,948.12 = 78,909.12/x
  3. Step 3: Cross multiply
    143,437.20x = 197,948.12 × 78,909.12
  4. Step 4: Simplify right side
    143,437.20x = 15,619,911,954.85
  5. Step 5: Solve for x
    x = 15,619,911,954.85/143,437.20
  6. Step 6: Final answer
    x = 108,897.22

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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.