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Finding the Fourth Proportional to 75,470.89, 113,210.19 and 19,311.48

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Solution

The fourth proportional to 75,470.89, 113,210.19 and 19,311.48 is: 28,968.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,470.89 : 113,210.19 = 19,311.48 : x
  2. Step 2: Convert to fraction form
    75,470.89/113,210.19 = 19,311.48/x
  3. Step 3: Cross multiply
    75,470.89x = 113,210.19 × 19,311.48
  4. Step 4: Simplify right side
    75,470.89x = 2,186,256,319.98
  5. Step 5: Solve for x
    x = 2,186,256,319.98/75,470.89
  6. Step 6: Final answer
    x = 28,968.21

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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.