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Finding the Fourth Proportional to 74,920.80, 103,390.64 and 43,088.96

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Solution

The fourth proportional to 74,920.80, 103,390.64 and 43,088.96 is: 59,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,920.80 : 103,390.64 = 43,088.96 : x
  2. Step 2: Convert to fraction form
    74,920.80/103,390.64 = 43,088.96/x
  3. Step 3: Cross multiply
    74,920.80x = 103,390.64 × 43,088.96
  4. Step 4: Simplify right side
    74,920.80x = 4,454,995,151.33
  5. Step 5: Solve for x
    x = 4,454,995,151.33/74,920.80
  6. Step 6: Final answer
    x = 59,462.73

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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.