Home / 78,829.20-118,243.80-75,767.40

Finding the Fourth Proportional to 78,829.20, 118,243.80 and 75,767.40

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Solution

The fourth proportional to 78,829.20, 118,243.80 and 75,767.40 is: 113,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,829.20 : 118,243.80 = 75,767.40 : x
  2. Step 2: Convert to fraction form
    78,829.20/118,243.80 = 75,767.40/x
  3. Step 3: Cross multiply
    78,829.20x = 118,243.80 × 75,767.40
  4. Step 4: Simplify right side
    78,829.20x = 8,959,025,292.12
  5. Step 5: Solve for x
    x = 8,959,025,292.12/78,829.20
  6. Step 6: Final answer
    x = 113,651.10

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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.