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Finding the Fourth Proportional to 70,437.70, 105,663.07 and 25,470.28

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Solution

The fourth proportional to 70,437.70, 105,663.07 and 25,470.28 is: 38,207.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,437.70 : 105,663.07 = 25,470.28 : x
  2. Step 2: Convert to fraction form
    70,437.70/105,663.07 = 25,470.28/x
  3. Step 3: Cross multiply
    70,437.70x = 105,663.07 × 25,470.28
  4. Step 4: Simplify right side
    70,437.70x = 2,691,267,999.21
  5. Step 5: Solve for x
    x = 2,691,267,999.21/70,437.70
  6. Step 6: Final answer
    x = 38,207.78

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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.