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Finding the Fourth Proportional to 316,556.78, 474,859.76 and 91,920.92

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Solution

The fourth proportional to 316,556.78, 474,859.76 and 91,920.92 is: 137,888.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,556.78 : 474,859.76 = 91,920.92 : x
  2. Step 2: Convert to fraction form
    316,556.78/474,859.76 = 91,920.92/x
  3. Step 3: Cross multiply
    316,556.78x = 474,859.76 × 91,920.92
  4. Step 4: Simplify right side
    316,556.78x = 43,649,543,176.28
  5. Step 5: Solve for x
    x = 43,649,543,176.28/316,556.78
  6. Step 6: Final answer
    x = 137,888.51

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1.5x scale

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.