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Finding the Fourth Proportional to 155,955.25, 215,218.25 and 84,335.28

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Solution

The fourth proportional to 155,955.25, 215,218.25 and 84,335.28 is: 116,382.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,955.25 : 215,218.25 = 84,335.28 : x
  2. Step 2: Convert to fraction form
    155,955.25/215,218.25 = 84,335.28/x
  3. Step 3: Cross multiply
    155,955.25x = 215,218.25 × 84,335.28
  4. Step 4: Simplify right side
    155,955.25x = 18,150,491,374.86
  5. Step 5: Solve for x
    x = 18,150,491,374.86/155,955.25
  6. Step 6: Final answer
    x = 116,382.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.