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Finding the Fourth Proportional to 57,139.80, 78,891.89 and 35,637.95

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Solution

The fourth proportional to 57,139.80, 78,891.89 and 35,637.95 is: 49,204.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,139.80 : 78,891.89 = 35,637.95 : x
  2. Step 2: Convert to fraction form
    57,139.80/78,891.89 = 35,637.95/x
  3. Step 3: Cross multiply
    57,139.80x = 78,891.89 × 35,637.95
  4. Step 4: Simplify right side
    57,139.80x = 2,811,545,231.23
  5. Step 5: Solve for x
    x = 2,811,545,231.23/57,139.80
  6. Step 6: Final answer
    x = 49,204.67

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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.