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Finding the Fourth Proportional to 96,378.80, 144,422.40 and 81,507.20

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Solution

The fourth proportional to 96,378.80, 144,422.40 and 81,507.20 is: 122,137.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,378.80 : 144,422.40 = 81,507.20 : x
  2. Step 2: Convert to fraction form
    96,378.80/144,422.40 = 81,507.20/x
  3. Step 3: Cross multiply
    96,378.80x = 144,422.40 × 81,507.20
  4. Step 4: Simplify right side
    96,378.80x = 11,771,465,441.28
  5. Step 5: Solve for x
    x = 11,771,465,441.28/96,378.80
  6. Step 6: Final answer
    x = 122,137.50

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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.