Home / 138,775.04-191,518.80-78,324.20

Finding the Fourth Proportional to 138,775.04, 191,518.80 and 78,324.20

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Solution

The fourth proportional to 138,775.04, 191,518.80 and 78,324.20 is: 108,092.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,775.04 : 191,518.80 = 78,324.20 : x
  2. Step 2: Convert to fraction form
    138,775.04/191,518.80 = 78,324.20/x
  3. Step 3: Cross multiply
    138,775.04x = 191,518.80 × 78,324.20
  4. Step 4: Simplify right side
    138,775.04x = 15,000,556,794.96
  5. Step 5: Solve for x
    x = 15,000,556,794.96/138,775.04
  6. Step 6: Final answer
    x = 108,092.61

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1.5x scale

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.