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Finding the Fourth Proportional to 70,397.91, 105,596.06 and 28,288.71

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Solution

The fourth proportional to 70,397.91, 105,596.06 and 28,288.71 is: 42,432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,397.91 : 105,596.06 = 28,288.71 : x
  2. Step 2: Convert to fraction form
    70,397.91/105,596.06 = 28,288.71/x
  3. Step 3: Cross multiply
    70,397.91x = 105,596.06 × 28,288.71
  4. Step 4: Simplify right side
    70,397.91x = 2,987,176,177.04
  5. Step 5: Solve for x
    x = 2,987,176,177.04/70,397.91
  6. Step 6: Final answer
    x = 42,432.74

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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.