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Finding the Fourth Proportional to 144,643.20, 216,867.60 and 65,716.80

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Solution

The fourth proportional to 144,643.20, 216,867.60 and 65,716.80 is: 98,531.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,643.20 : 216,867.60 = 65,716.80 : x
  2. Step 2: Convert to fraction form
    144,643.20/216,867.60 = 65,716.80/x
  3. Step 3: Cross multiply
    144,643.20x = 216,867.60 × 65,716.80
  4. Step 4: Simplify right side
    144,643.20x = 14,251,844,695.68
  5. Step 5: Solve for x
    x = 14,251,844,695.68/144,643.20
  6. Step 6: Final answer
    x = 98,531.04

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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.