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Finding the Fourth Proportional to 65,741.20, 98,611.80 and 54,660.40

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Solution

The fourth proportional to 65,741.20, 98,611.80 and 54,660.40 is: 81,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,741.20 : 98,611.80 = 54,660.40 : x
  2. Step 2: Convert to fraction form
    65,741.20/98,611.80 = 54,660.40/x
  3. Step 3: Cross multiply
    65,741.20x = 98,611.80 × 54,660.40
  4. Step 4: Simplify right side
    65,741.20x = 5,390,160,432.72
  5. Step 5: Solve for x
    x = 5,390,160,432.72/65,741.20
  6. Step 6: Final answer
    x = 81,990.60

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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.