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Finding the Fourth Proportional to 65,860.40, 98,790.60 and 42,240.80

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Solution

The fourth proportional to 65,860.40, 98,790.60 and 42,240.80 is: 63,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,860.40 : 98,790.60 = 42,240.80 : x
  2. Step 2: Convert to fraction form
    65,860.40/98,790.60 = 42,240.80/x
  3. Step 3: Cross multiply
    65,860.40x = 98,790.60 × 42,240.80
  4. Step 4: Simplify right side
    65,860.40x = 4,172,993,976.48
  5. Step 5: Solve for x
    x = 4,172,993,976.48/65,860.40
  6. Step 6: Final answer
    x = 63,361.20

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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.