Home / 261,025.20-391,499.40-74,055.60

Finding the Fourth Proportional to 261,025.20, 391,499.40 and 74,055.60

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Solution

The fourth proportional to 261,025.20, 391,499.40 and 74,055.60 is: 111,072.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,025.20 : 391,499.40 = 74,055.60 : x
  2. Step 2: Convert to fraction form
    261,025.20/391,499.40 = 74,055.60/x
  3. Step 3: Cross multiply
    261,025.20x = 391,499.40 × 74,055.60
  4. Step 4: Simplify right side
    261,025.20x = 28,992,722,966.64
  5. Step 5: Solve for x
    x = 28,992,722,966.64/261,025.20
  6. Step 6: Final answer
    x = 111,072.51

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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.