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Finding the Fourth Proportional to 78,797.36, 117,581.46 and 70,305.50

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Solution

The fourth proportional to 78,797.36, 117,581.46 and 70,305.50 is: 104,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,797.36 : 117,581.46 = 70,305.50 : x
  2. Step 2: Convert to fraction form
    78,797.36/117,581.46 = 70,305.50/x
  3. Step 3: Cross multiply
    78,797.36x = 117,581.46 × 70,305.50
  4. Step 4: Simplify right side
    78,797.36x = 8,266,623,336.03
  5. Step 5: Solve for x
    x = 8,266,623,336.03/78,797.36
  6. Step 6: Final answer
    x = 104,909.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.