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Finding the Fourth Proportional to 197,689.31, 272,830.79 and 112,819.13

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Solution

The fourth proportional to 197,689.31, 272,830.79 and 112,819.13 is: 155,701.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,689.31 : 272,830.79 = 112,819.13 : x
  2. Step 2: Convert to fraction form
    197,689.31/272,830.79 = 112,819.13/x
  3. Step 3: Cross multiply
    197,689.31x = 272,830.79 × 112,819.13
  4. Step 4: Simplify right side
    197,689.31x = 30,780,532,365.01
  5. Step 5: Solve for x
    x = 30,780,532,365.01/197,689.31
  6. Step 6: Final answer
    x = 155,701.55

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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.