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Finding the Fourth Proportional to 118,877.20, 178,315.80 and 76,886.80

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Solution

The fourth proportional to 118,877.20, 178,315.80 and 76,886.80 is: 115,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,877.20 : 178,315.80 = 76,886.80 : x
  2. Step 2: Convert to fraction form
    118,877.20/178,315.80 = 76,886.80/x
  3. Step 3: Cross multiply
    118,877.20x = 178,315.80 × 76,886.80
  4. Step 4: Simplify right side
    118,877.20x = 13,710,131,251.44
  5. Step 5: Solve for x
    x = 13,710,131,251.44/118,877.20
  6. Step 6: Final answer
    x = 115,330.20

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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.