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Finding the Fourth Proportional to 96,413.20, 144,328.20 and 85,915.60

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Solution

The fourth proportional to 96,413.20, 144,328.20 and 85,915.60 is: 128,613.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,413.20 : 144,328.20 = 85,915.60 : x
  2. Step 2: Convert to fraction form
    96,413.20/144,328.20 = 85,915.60/x
  3. Step 3: Cross multiply
    96,413.20x = 144,328.20 × 85,915.60
  4. Step 4: Simplify right side
    96,413.20x = 12,400,043,899.92
  5. Step 5: Solve for x
    x = 12,400,043,899.92/96,413.20
  6. Step 6: Final answer
    x = 128,613.55

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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.