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Finding the Fourth Proportional to 42,271.92, 63,439.80 and 28,912.92

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Solution

The fourth proportional to 42,271.92, 63,439.80 and 28,912.92 is: 43,391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,271.92 : 63,439.80 = 28,912.92 : x
  2. Step 2: Convert to fraction form
    42,271.92/63,439.80 = 28,912.92/x
  3. Step 3: Cross multiply
    42,271.92x = 63,439.80 × 28,912.92
  4. Step 4: Simplify right side
    42,271.92x = 1,834,229,862.22
  5. Step 5: Solve for x
    x = 1,834,229,862.22/42,271.92
  6. Step 6: Final answer
    x = 43,391.21

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1.5x scale

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.