Home / 78,677.20-118,246.20-68,539.60

Finding the Fourth Proportional to 78,677.20, 118,246.20 and 68,539.60

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Solution

The fourth proportional to 78,677.20, 118,246.20 and 68,539.60 is: 103,010.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,677.20 : 118,246.20 = 68,539.60 : x
  2. Step 2: Convert to fraction form
    78,677.20/118,246.20 = 68,539.60/x
  3. Step 3: Cross multiply
    78,677.20x = 118,246.20 × 68,539.60
  4. Step 4: Simplify right side
    78,677.20x = 8,104,547,249.52
  5. Step 5: Solve for x
    x = 8,104,547,249.52/78,677.20
  6. Step 6: Final answer
    x = 103,010.11

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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.