Home / 78,280.86-108,104.28-54,143.64

Finding the Fourth Proportional to 78,280.86, 108,104.28 and 54,143.64

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Solution

The fourth proportional to 78,280.86, 108,104.28 and 54,143.64 is: 74,771.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,280.86 : 108,104.28 = 54,143.64 : x
  2. Step 2: Convert to fraction form
    78,280.86/108,104.28 = 54,143.64/x
  3. Step 3: Cross multiply
    78,280.86x = 108,104.28 × 54,143.64
  4. Step 4: Simplify right side
    78,280.86x = 5,853,159,218.78
  5. Step 5: Solve for x
    x = 5,853,159,218.78/78,280.86
  6. Step 6: Final answer
    x = 74,771.27

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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.