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Finding the Fourth Proportional to 78,761.45, 118,141.97 and 19,597.16

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Solution

The fourth proportional to 78,761.45, 118,141.97 and 19,597.16 is: 29,395.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,761.45 : 118,141.97 = 19,597.16 : x
  2. Step 2: Convert to fraction form
    78,761.45/118,141.97 = 19,597.16/x
  3. Step 3: Cross multiply
    78,761.45x = 118,141.97 × 19,597.16
  4. Step 4: Simplify right side
    78,761.45x = 2,315,246,400.11
  5. Step 5: Solve for x
    x = 2,315,246,400.11/78,761.45
  6. Step 6: Final answer
    x = 29,395.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.