Home / 78,687.10-118,045.05-31,944.70

Finding the Fourth Proportional to 78,687.10, 118,045.05 and 31,944.70

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Solution

The fourth proportional to 78,687.10, 118,045.05 and 31,944.70 is: 47,922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,687.10 : 118,045.05 = 31,944.70 : x
  2. Step 2: Convert to fraction form
    78,687.10/118,045.05 = 31,944.70/x
  3. Step 3: Cross multiply
    78,687.10x = 118,045.05 × 31,944.70
  4. Step 4: Simplify right side
    78,687.10x = 3,770,913,708.74
  5. Step 5: Solve for x
    x = 3,770,913,708.74/78,687.10
  6. Step 6: Final answer
    x = 47,922.90

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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.