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Finding the Fourth Proportional to 78,709.64, 108,619.35 and 44,718.19

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Solution

The fourth proportional to 78,709.64, 108,619.35 and 44,718.19 is: 61,711.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,709.64 : 108,619.35 = 44,718.19 : x
  2. Step 2: Convert to fraction form
    78,709.64/108,619.35 = 44,718.19/x
  3. Step 3: Cross multiply
    78,709.64x = 108,619.35 × 44,718.19
  4. Step 4: Simplify right side
    78,709.64x = 4,857,259,964.29
  5. Step 5: Solve for x
    x = 4,857,259,964.29/78,709.64
  6. Step 6: Final answer
    x = 61,711.12

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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.