Home / 78,718.20-118,077.30-75,437.70

Finding the Fourth Proportional to 78,718.20, 118,077.30 and 75,437.70

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Solution

The fourth proportional to 78,718.20, 118,077.30 and 75,437.70 is: 113,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.20 : 118,077.30 = 75,437.70 : x
  2. Step 2: Convert to fraction form
    78,718.20/118,077.30 = 75,437.70/x
  3. Step 3: Cross multiply
    78,718.20x = 118,077.30 × 75,437.70
  4. Step 4: Simplify right side
    78,718.20x = 8,907,479,934.21
  5. Step 5: Solve for x
    x = 8,907,479,934.21/78,718.20
  6. Step 6: Final answer
    x = 113,156.55

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1.5x scale

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.