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Finding the Fourth Proportional to 66,948,400.80, 100,422,601.20 and 55,610,992.80

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Solution

The fourth proportional to 66,948,400.80, 100,422,601.20 and 55,610,992.80 is: 83,416,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,948,400.80 : 100,422,601.20 = 55,610,992.80 : x
  2. Step 2: Convert to fraction form
    66,948,400.80/100,422,601.20 = 55,610,992.80/x
  3. Step 3: Cross multiply
    66,948,400.80x = 100,422,601.20 × 55,610,992.80
  4. Step 4: Simplify right side
    66,948,400.80x = 5,584,600,552,290,471
  5. Step 5: Solve for x
    x = 5,584,600,552,290,471/66,948,400.80
  6. Step 6: Final answer
    x = 83,416,489.20

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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.