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Finding the Fourth Proportional to 96,885.60, 145,328.40 and 61,720.80

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Solution

The fourth proportional to 96,885.60, 145,328.40 and 61,720.80 is: 92,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,885.60 : 145,328.40 = 61,720.80 : x
  2. Step 2: Convert to fraction form
    96,885.60/145,328.40 = 61,720.80/x
  3. Step 3: Cross multiply
    96,885.60x = 145,328.40 × 61,720.80
  4. Step 4: Simplify right side
    96,885.60x = 8,969,785,110.72
  5. Step 5: Solve for x
    x = 8,969,785,110.72/96,885.60
  6. Step 6: Final answer
    x = 92,581.20

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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.