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Finding the Fourth Proportional to 78,970.53, 108,981.08 and 43,162.86

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Solution

The fourth proportional to 78,970.53, 108,981.08 and 43,162.86 is: 59,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,970.53 : 108,981.08 = 43,162.86 : x
  2. Step 2: Convert to fraction form
    78,970.53/108,981.08 = 43,162.86/x
  3. Step 3: Cross multiply
    78,970.53x = 108,981.08 × 43,162.86
  4. Step 4: Simplify right side
    78,970.53x = 4,703,934,882.87
  5. Step 5: Solve for x
    x = 4,703,934,882.87/78,970.53
  6. Step 6: Final answer
    x = 59,565.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.