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Finding the Fourth Proportional to 79,941.61, 119,888.37 and 65,866.75

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Solution

The fourth proportional to 79,941.61, 119,888.37 and 65,866.75 is: 98,780.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,941.61 : 119,888.37 = 65,866.75 : x
  2. Step 2: Convert to fraction form
    79,941.61/119,888.37 = 65,866.75/x
  3. Step 3: Cross multiply
    79,941.61x = 119,888.37 × 65,866.75
  4. Step 4: Simplify right side
    79,941.61x = 7,896,657,294.70
  5. Step 5: Solve for x
    x = 7,896,657,294.70/79,941.61
  6. Step 6: Final answer
    x = 98,780.31

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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.