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Finding the Fourth Proportional to 70,319.91, 105,552.81 and 47,108.55

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Solution

The fourth proportional to 70,319.91, 105,552.81 and 47,108.55 is: 70,711.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,319.91 : 105,552.81 = 47,108.55 : x
  2. Step 2: Convert to fraction form
    70,319.91/105,552.81 = 47,108.55/x
  3. Step 3: Cross multiply
    70,319.91x = 105,552.81 × 47,108.55
  4. Step 4: Simplify right side
    70,319.91x = 4,972,439,827.53
  5. Step 5: Solve for x
    x = 4,972,439,827.53/70,319.91
  6. Step 6: Final answer
    x = 70,711.69

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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.