Home / 128,795.11-177,746.34-71,452.78

Finding the Fourth Proportional to 128,795.11, 177,746.34 and 71,452.78

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Solution

The fourth proportional to 128,795.11, 177,746.34 and 71,452.78 is: 98,609.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,795.11 : 177,746.34 = 71,452.78 : x
  2. Step 2: Convert to fraction form
    128,795.11/177,746.34 = 71,452.78/x
  3. Step 3: Cross multiply
    128,795.11x = 177,746.34 × 71,452.78
  4. Step 4: Simplify right side
    128,795.11x = 12,700,470,127.83
  5. Step 5: Solve for x
    x = 12,700,470,127.83/128,795.11
  6. Step 6: Final answer
    x = 98,609.88

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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.