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Finding the Fourth Proportional to 118,355.20, 177,532.80 and 85,307.20

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Solution

The fourth proportional to 118,355.20, 177,532.80 and 85,307.20 is: 127,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,355.20 : 177,532.80 = 85,307.20 : x
  2. Step 2: Convert to fraction form
    118,355.20/177,532.80 = 85,307.20/x
  3. Step 3: Cross multiply
    118,355.20x = 177,532.80 × 85,307.20
  4. Step 4: Simplify right side
    118,355.20x = 15,144,826,076.16
  5. Step 5: Solve for x
    x = 15,144,826,076.16/118,355.20
  6. Step 6: Final answer
    x = 127,960.80

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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.