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Finding the Fourth Proportional to 78,869.08, 108,771.42 and 70,266.88

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Solution

The fourth proportional to 78,869.08, 108,771.42 and 70,266.88 is: 96,907.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,869.08 : 108,771.42 = 70,266.88 : x
  2. Step 2: Convert to fraction form
    78,869.08/108,771.42 = 70,266.88/x
  3. Step 3: Cross multiply
    78,869.08x = 108,771.42 × 70,266.88
  4. Step 4: Simplify right side
    78,869.08x = 7,643,028,316.57
  5. Step 5: Solve for x
    x = 7,643,028,316.57/78,869.08
  6. Step 6: Final answer
    x = 96,907.79

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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.