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Finding the Fourth Proportional to 74,587.80, 111,881.70 and 30,191.70

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Solution

The fourth proportional to 74,587.80, 111,881.70 and 30,191.70 is: 45,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,587.80 : 111,881.70 = 30,191.70 : x
  2. Step 2: Convert to fraction form
    74,587.80/111,881.70 = 30,191.70/x
  3. Step 3: Cross multiply
    74,587.80x = 111,881.70 × 30,191.70
  4. Step 4: Simplify right side
    74,587.80x = 3,377,898,721.89
  5. Step 5: Solve for x
    x = 3,377,898,721.89/74,587.80
  6. Step 6: Final answer
    x = 45,287.55

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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.