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Finding the Fourth Proportional to 65,721.80, 98,582.70 and 60,278.60

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Solution

The fourth proportional to 65,721.80, 98,582.70 and 60,278.60 is: 90,417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.80 : 98,582.70 = 60,278.60 : x
  2. Step 2: Convert to fraction form
    65,721.80/98,582.70 = 60,278.60/x
  3. Step 3: Cross multiply
    65,721.80x = 98,582.70 × 60,278.60
  4. Step 4: Simplify right side
    65,721.80x = 5,942,427,140.22
  5. Step 5: Solve for x
    x = 5,942,427,140.22/65,721.80
  6. Step 6: Final answer
    x = 90,417.90

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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.