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Finding the Fourth Proportional to 65,713.80, 98,570.70 and 57,160.20

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Solution

The fourth proportional to 65,713.80, 98,570.70 and 57,160.20 is: 85,740.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,713.80 : 98,570.70 = 57,160.20 : x
  2. Step 2: Convert to fraction form
    65,713.80/98,570.70 = 57,160.20/x
  3. Step 3: Cross multiply
    65,713.80x = 98,570.70 × 57,160.20
  4. Step 4: Simplify right side
    65,713.80x = 5,634,320,926.14
  5. Step 5: Solve for x
    x = 5,634,320,926.14/65,713.80
  6. Step 6: Final answer
    x = 85,740.30

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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.