Home / 78,718.30-118,077.45-75,437.80

Finding the Fourth Proportional to 78,718.30, 118,077.45 and 75,437.80

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Solution

The fourth proportional to 78,718.30, 118,077.45 and 75,437.80 is: 113,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.30 : 118,077.45 = 75,437.80 : x
  2. Step 2: Convert to fraction form
    78,718.30/118,077.45 = 75,437.80/x
  3. Step 3: Cross multiply
    78,718.30x = 118,077.45 × 75,437.80
  4. Step 4: Simplify right side
    78,718.30x = 8,907,503,057.61
  5. Step 5: Solve for x
    x = 8,907,503,057.61/78,718.30
  6. Step 6: Final answer
    x = 113,156.70

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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.