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Finding the Fourth Proportional to 47,139.57, 70,719.78 and 15,559.39

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Solution

The fourth proportional to 47,139.57, 70,719.78 and 15,559.39 is: 23,342.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,139.57 : 70,719.78 = 15,559.39 : x
  2. Step 2: Convert to fraction form
    47,139.57/70,719.78 = 15,559.39/x
  3. Step 3: Cross multiply
    47,139.57x = 70,719.78 × 15,559.39
  4. Step 4: Simplify right side
    47,139.57x = 1,100,356,637.73
  5. Step 5: Solve for x
    x = 1,100,356,637.73/47,139.57
  6. Step 6: Final answer
    x = 23,342.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.