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Finding the Fourth Proportional to 74,854.79, 103,299.80 and 40,863.30

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Solution

The fourth proportional to 74,854.79, 103,299.80 and 40,863.30 is: 56,391.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,854.79 : 103,299.80 = 40,863.30 : x
  2. Step 2: Convert to fraction form
    74,854.79/103,299.80 = 40,863.30/x
  3. Step 3: Cross multiply
    74,854.79x = 103,299.80 × 40,863.30
  4. Step 4: Simplify right side
    74,854.79x = 4,221,170,717.34
  5. Step 5: Solve for x
    x = 4,221,170,717.34/74,854.79
  6. Step 6: Final answer
    x = 56,391.46

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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.