Home / 154,851.40-213,693.78-87,785.80

Finding the Fourth Proportional to 154,851.40, 213,693.78 and 87,785.80

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Solution

The fourth proportional to 154,851.40, 213,693.78 and 87,785.80 is: 121,143.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,851.40 : 213,693.78 = 87,785.80 : x
  2. Step 2: Convert to fraction form
    154,851.40/213,693.78 = 87,785.80/x
  3. Step 3: Cross multiply
    154,851.40x = 213,693.78 × 87,785.80
  4. Step 4: Simplify right side
    154,851.40x = 18,759,279,432.32
  5. Step 5: Solve for x
    x = 18,759,279,432.32/154,851.40
  6. Step 6: Final answer
    x = 121,143.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.