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Finding the Fourth Proportional to 65,871.80, 98,678.10 and 39,498.20

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Solution

The fourth proportional to 65,871.80, 98,678.10 and 39,498.20 is: 59,169.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,871.80 : 98,678.10 = 39,498.20 : x
  2. Step 2: Convert to fraction form
    65,871.80/98,678.10 = 39,498.20/x
  3. Step 3: Cross multiply
    65,871.80x = 98,678.10 × 39,498.20
  4. Step 4: Simplify right side
    65,871.80x = 3,897,607,329.42
  5. Step 5: Solve for x
    x = 3,897,607,329.42/65,871.80
  6. Step 6: Final answer
    x = 59,169.59

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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.