Home / 259,905.20-389,987.40-147,671.60

Finding the Fourth Proportional to 259,905.20, 389,987.40 and 147,671.60

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Solution

The fourth proportional to 259,905.20, 389,987.40 and 147,671.60 is: 221,581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,905.20 : 389,987.40 = 147,671.60 : x
  2. Step 2: Convert to fraction form
    259,905.20/389,987.40 = 147,671.60/x
  3. Step 3: Cross multiply
    259,905.20x = 389,987.40 × 147,671.60
  4. Step 4: Simplify right side
    259,905.20x = 57,590,063,337.84
  5. Step 5: Solve for x
    x = 57,590,063,337.84/259,905.20
  6. Step 6: Final answer
    x = 221,581.04

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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.