Home / 65,734.89-90,523.40-57,117.20

Finding the Fourth Proportional to 65,734.89, 90,523.40 and 57,117.20

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Solution

The fourth proportional to 65,734.89, 90,523.40 and 57,117.20 is: 78,655.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,734.89 : 90,523.40 = 57,117.20 : x
  2. Step 2: Convert to fraction form
    65,734.89/90,523.40 = 57,117.20/x
  3. Step 3: Cross multiply
    65,734.89x = 90,523.40 × 57,117.20
  4. Step 4: Simplify right side
    65,734.89x = 5,170,442,404.28
  5. Step 5: Solve for x
    x = 5,170,442,404.28/65,734.89
  6. Step 6: Final answer
    x = 78,655.98

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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.