Home / 78,342.18-117,562.77-40,969.32

Finding the Fourth Proportional to 78,342.18, 117,562.77 and 40,969.32

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Solution

The fourth proportional to 78,342.18, 117,562.77 and 40,969.32 is: 61,479.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.18 : 117,562.77 = 40,969.32 : x
  2. Step 2: Convert to fraction form
    78,342.18/117,562.77 = 40,969.32/x
  3. Step 3: Cross multiply
    78,342.18x = 117,562.77 × 40,969.32
  4. Step 4: Simplify right side
    78,342.18x = 4,816,466,744.22
  5. Step 5: Solve for x
    x = 4,816,466,744.22/78,342.18
  6. Step 6: Final answer
    x = 61,479.87

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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.