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Finding the Fourth Proportional to 142,473, 196,606.80 and 78,806.76

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Solution

The fourth proportional to 142,473, 196,606.80 and 78,806.76 is: 108,750.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,473 : 196,606.80 = 78,806.76 : x
  2. Step 2: Convert to fraction form
    142,473/196,606.80 = 78,806.76/x
  3. Step 3: Cross multiply
    142,473x = 196,606.80 × 78,806.76
  4. Step 4: Simplify right side
    142,473x = 15,493,944,901.97
  5. Step 5: Solve for x
    x = 15,493,944,901.97/142,473
  6. Step 6: Final answer
    x = 108,750.04

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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.