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Finding the Fourth Proportional to 78,753.64, 108,447.78 and 70,367.08

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Solution

The fourth proportional to 78,753.64, 108,447.78 and 70,367.08 is: 96,899.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,753.64 : 108,447.78 = 70,367.08 : x
  2. Step 2: Convert to fraction form
    78,753.64/108,447.78 = 70,367.08/x
  3. Step 3: Cross multiply
    78,753.64x = 108,447.78 × 70,367.08
  4. Step 4: Simplify right side
    78,753.64x = 7,631,153,611.08
  5. Step 5: Solve for x
    x = 7,631,153,611.08/78,753.64
  6. Step 6: Final answer
    x = 96,899.06

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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.