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Finding the Fourth Proportional to 78,479.32, 108,305.16 and 44,488.46

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Solution

The fourth proportional to 78,479.32, 108,305.16 and 44,488.46 is: 61,396.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,479.32 : 108,305.16 = 44,488.46 : x
  2. Step 2: Convert to fraction form
    78,479.32/108,305.16 = 44,488.46/x
  3. Step 3: Cross multiply
    78,479.32x = 108,305.16 × 44,488.46
  4. Step 4: Simplify right side
    78,479.32x = 4,818,330,192.46
  5. Step 5: Solve for x
    x = 4,818,330,192.46/78,479.32
  6. Step 6: Final answer
    x = 61,396.18

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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.