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Finding the Fourth Proportional to 65,745.60, 98,618.40 and 39,436.80

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Solution

The fourth proportional to 65,745.60, 98,618.40 and 39,436.80 is: 59,155.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,745.60 : 98,618.40 = 39,436.80 : x
  2. Step 2: Convert to fraction form
    65,745.60/98,618.40 = 39,436.80/x
  3. Step 3: Cross multiply
    65,745.60x = 98,618.40 × 39,436.80
  4. Step 4: Simplify right side
    65,745.60x = 3,889,194,117.12
  5. Step 5: Solve for x
    x = 3,889,194,117.12/65,745.60
  6. Step 6: Final answer
    x = 59,155.20

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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.