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Finding the Fourth Proportional to 57,673.80, 86,510.70 and 31,429.80

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Solution

The fourth proportional to 57,673.80, 86,510.70 and 31,429.80 is: 47,144.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,673.80 : 86,510.70 = 31,429.80 : x
  2. Step 2: Convert to fraction form
    57,673.80/86,510.70 = 31,429.80/x
  3. Step 3: Cross multiply
    57,673.80x = 86,510.70 × 31,429.80
  4. Step 4: Simplify right side
    57,673.80x = 2,719,013,998.86
  5. Step 5: Solve for x
    x = 2,719,013,998.86/57,673.80
  6. Step 6: Final answer
    x = 47,144.70

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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.