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Finding the Fourth Proportional to 96,940.80, 145,411.20 and 85,276.80

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Solution

The fourth proportional to 96,940.80, 145,411.20 and 85,276.80 is: 127,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,940.80 : 145,411.20 = 85,276.80 : x
  2. Step 2: Convert to fraction form
    96,940.80/145,411.20 = 85,276.80/x
  3. Step 3: Cross multiply
    96,940.80x = 145,411.20 × 85,276.80
  4. Step 4: Simplify right side
    96,940.80x = 12,400,201,820.16
  5. Step 5: Solve for x
    x = 12,400,201,820.16/96,940.80
  6. Step 6: Final answer
    x = 127,915.20

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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.