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Finding the Fourth Proportional to 65,485.20, 98,227.80 and 42,934.80

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Solution

The fourth proportional to 65,485.20, 98,227.80 and 42,934.80 is: 64,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,485.20 : 98,227.80 = 42,934.80 : x
  2. Step 2: Convert to fraction form
    65,485.20/98,227.80 = 42,934.80/x
  3. Step 3: Cross multiply
    65,485.20x = 98,227.80 × 42,934.80
  4. Step 4: Simplify right side
    65,485.20x = 4,217,390,947.44
  5. Step 5: Solve for x
    x = 4,217,390,947.44/65,485.20
  6. Step 6: Final answer
    x = 64,402.20

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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.