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Finding the Fourth Proportional to 143,385.52, 197,870.92 and 79,722.76

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Solution

The fourth proportional to 143,385.52, 197,870.92 and 79,722.76 is: 110,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,385.52 : 197,870.92 = 79,722.76 : x
  2. Step 2: Convert to fraction form
    143,385.52/197,870.92 = 79,722.76/x
  3. Step 3: Cross multiply
    143,385.52x = 197,870.92 × 79,722.76
  4. Step 4: Simplify right side
    143,385.52x = 15,774,815,866.14
  5. Step 5: Solve for x
    x = 15,774,815,866.14/143,385.52
  6. Step 6: Final answer
    x = 110,016.80

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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.