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Finding the Fourth Proportional to 74,859.92, 103,310.56 and 43,031.76

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Solution

The fourth proportional to 74,859.92, 103,310.56 and 43,031.76 is: 59,386.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,859.92 : 103,310.56 = 43,031.76 : x
  2. Step 2: Convert to fraction form
    74,859.92/103,310.56 = 43,031.76/x
  3. Step 3: Cross multiply
    74,859.92x = 103,310.56 × 43,031.76
  4. Step 4: Simplify right side
    74,859.92x = 4,445,635,223.39
  5. Step 5: Solve for x
    x = 4,445,635,223.39/74,859.92
  6. Step 6: Final answer
    x = 59,386.05

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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.