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Finding the Fourth Proportional to 70,322.90, 105,472.98 and 25,970.54

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Solution

The fourth proportional to 70,322.90, 105,472.98 and 25,970.54 is: 38,951.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,322.90 : 105,472.98 = 25,970.54 : x
  2. Step 2: Convert to fraction form
    70,322.90/105,472.98 = 25,970.54/x
  3. Step 3: Cross multiply
    70,322.90x = 105,472.98 × 25,970.54
  4. Step 4: Simplify right side
    70,322.90x = 2,739,190,246.01
  5. Step 5: Solve for x
    x = 2,739,190,246.01/70,322.90
  6. Step 6: Final answer
    x = 38,951.61

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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.