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Finding the Fourth Proportional to 78,796.80, 118,486.80 and 65,966.40

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Solution

The fourth proportional to 78,796.80, 118,486.80 and 65,966.40 is: 99,193.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,796.80 : 118,486.80 = 65,966.40 : x
  2. Step 2: Convert to fraction form
    78,796.80/118,486.80 = 65,966.40/x
  3. Step 3: Cross multiply
    78,796.80x = 118,486.80 × 65,966.40
  4. Step 4: Simplify right side
    78,796.80x = 7,816,147,643.52
  5. Step 5: Solve for x
    x = 7,816,147,643.52/78,796.80
  6. Step 6: Final answer
    x = 99,193.72

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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.