Home / 138,619.60-207,929.40-135,854.80

Finding the Fourth Proportional to 138,619.60, 207,929.40 and 135,854.80

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Solution

The fourth proportional to 138,619.60, 207,929.40 and 135,854.80 is: 203,782.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,619.60 : 207,929.40 = 135,854.80 : x
  2. Step 2: Convert to fraction form
    138,619.60/207,929.40 = 135,854.80/x
  3. Step 3: Cross multiply
    138,619.60x = 207,929.40 × 135,854.80
  4. Step 4: Simplify right side
    138,619.60x = 28,248,207,051.12
  5. Step 5: Solve for x
    x = 28,248,207,051.12/138,619.60
  6. Step 6: Final answer
    x = 203,782.20

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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.