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Finding the Fourth Proportional to 96,781.20, 145,344.60 and 70,515.60

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Solution

The fourth proportional to 96,781.20, 145,344.60 and 70,515.60 is: 105,899.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,781.20 : 145,344.60 = 70,515.60 : x
  2. Step 2: Convert to fraction form
    96,781.20/145,344.60 = 70,515.60/x
  3. Step 3: Cross multiply
    96,781.20x = 145,344.60 × 70,515.60
  4. Step 4: Simplify right side
    96,781.20x = 10,249,061,675.76
  5. Step 5: Solve for x
    x = 10,249,061,675.76/96,781.20
  6. Step 6: Final answer
    x = 105,899.30

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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.