Home / 78,876.20-118,314.30-77,580.20

Finding the Fourth Proportional to 78,876.20, 118,314.30 and 77,580.20

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Solution

The fourth proportional to 78,876.20, 118,314.30 and 77,580.20 is: 116,370.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.20 : 118,314.30 = 77,580.20 : x
  2. Step 2: Convert to fraction form
    78,876.20/118,314.30 = 77,580.20/x
  3. Step 3: Cross multiply
    78,876.20x = 118,314.30 × 77,580.20
  4. Step 4: Simplify right side
    78,876.20x = 9,178,847,056.86
  5. Step 5: Solve for x
    x = 9,178,847,056.86/78,876.20
  6. Step 6: Final answer
    x = 116,370.30

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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.