Home / 85,220.20-127,830.30-76,925.80

Finding the Fourth Proportional to 85,220.20, 127,830.30 and 76,925.80

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Solution

The fourth proportional to 85,220.20, 127,830.30 and 76,925.80 is: 115,388.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,220.20 : 127,830.30 = 76,925.80 : x
  2. Step 2: Convert to fraction form
    85,220.20/127,830.30 = 76,925.80/x
  3. Step 3: Cross multiply
    85,220.20x = 127,830.30 × 76,925.80
  4. Step 4: Simplify right side
    85,220.20x = 9,833,448,091.74
  5. Step 5: Solve for x
    x = 9,833,448,091.74/85,220.20
  6. Step 6: Final answer
    x = 115,388.70

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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.