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Finding the Fourth Proportional to 78,668.64, 108,565.32 and 44,678.58

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Solution

The fourth proportional to 78,668.64, 108,565.32 and 44,678.58 is: 61,657.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,668.64 : 108,565.32 = 44,678.58 : x
  2. Step 2: Convert to fraction form
    78,668.64/108,565.32 = 44,678.58/x
  3. Step 3: Cross multiply
    78,668.64x = 108,565.32 × 44,678.58
  4. Step 4: Simplify right side
    78,668.64x = 4,850,544,334.85
  5. Step 5: Solve for x
    x = 4,850,544,334.85/78,668.64
  6. Step 6: Final answer
    x = 61,657.92

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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.