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Finding the Fourth Proportional to 74,476.80, 111,693.60 and 30,088.80

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Solution

The fourth proportional to 74,476.80, 111,693.60 and 30,088.80 is: 45,124.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,476.80 : 111,693.60 = 30,088.80 : x
  2. Step 2: Convert to fraction form
    74,476.80/111,693.60 = 30,088.80/x
  3. Step 3: Cross multiply
    74,476.80x = 111,693.60 × 30,088.80
  4. Step 4: Simplify right side
    74,476.80x = 3,360,726,391.68
  5. Step 5: Solve for x
    x = 3,360,726,391.68/74,476.80
  6. Step 6: Final answer
    x = 45,124.47

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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.