Home / 78,845.20-118,267.80-67,035.40

Finding the Fourth Proportional to 78,845.20, 118,267.80 and 67,035.40

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Solution

The fourth proportional to 78,845.20, 118,267.80 and 67,035.40 is: 100,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,845.20 : 118,267.80 = 67,035.40 : x
  2. Step 2: Convert to fraction form
    78,845.20/118,267.80 = 67,035.40/x
  3. Step 3: Cross multiply
    78,845.20x = 118,267.80 × 67,035.40
  4. Step 4: Simplify right side
    78,845.20x = 7,928,129,280.12
  5. Step 5: Solve for x
    x = 7,928,129,280.12/78,845.20
  6. Step 6: Final answer
    x = 100,553.10

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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.