Home / 78,178.79-117,268.29-54,909.11

Finding the Fourth Proportional to 78,178.79, 117,268.29 and 54,909.11

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Solution

The fourth proportional to 78,178.79, 117,268.29 and 54,909.11 is: 82,363.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,178.79 : 117,268.29 = 54,909.11 : x
  2. Step 2: Convert to fraction form
    78,178.79/117,268.29 = 54,909.11/x
  3. Step 3: Cross multiply
    78,178.79x = 117,268.29 × 54,909.11
  4. Step 4: Simplify right side
    78,178.79x = 6,439,097,728.29
  5. Step 5: Solve for x
    x = 6,439,097,728.29/78,178.79
  6. Step 6: Final answer
    x = 82,363.74

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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.