Home / 78,350.88-117,316.40-65,909.28

Finding the Fourth Proportional to 78,350.88, 117,316.40 and 65,909.28

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Solution

The fourth proportional to 78,350.88, 117,316.40 and 65,909.28 is: 98,687.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,350.88 : 117,316.40 = 65,909.28 : x
  2. Step 2: Convert to fraction form
    78,350.88/117,316.40 = 65,909.28/x
  3. Step 3: Cross multiply
    78,350.88x = 117,316.40 × 65,909.28
  4. Step 4: Simplify right side
    78,350.88x = 7,732,239,456.19
  5. Step 5: Solve for x
    x = 7,732,239,456.19/78,350.88
  6. Step 6: Final answer
    x = 98,687.33

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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.