Home / 138,207.36-207,518.40-79,109.76

Finding the Fourth Proportional to 138,207.36, 207,518.40 and 79,109.76

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Solution

The fourth proportional to 138,207.36, 207,518.40 and 79,109.76 is: 118,783.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,207.36 : 207,518.40 = 79,109.76 : x
  2. Step 2: Convert to fraction form
    138,207.36/207,518.40 = 79,109.76/x
  3. Step 3: Cross multiply
    138,207.36x = 207,518.40 × 79,109.76
  4. Step 4: Simplify right side
    138,207.36x = 16,416,730,819.58
  5. Step 5: Solve for x
    x = 16,416,730,819.58/138,207.36
  6. Step 6: Final answer
    x = 118,783.33

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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.