Home / 78,723.80-118,104.30-31,341.61

Finding the Fourth Proportional to 78,723.80, 118,104.30 and 31,341.61

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Solution

The fourth proportional to 78,723.80, 118,104.30 and 31,341.61 is: 47,019.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723.80 : 118,104.30 = 31,341.61 : x
  2. Step 2: Convert to fraction form
    78,723.80/118,104.30 = 31,341.61/x
  3. Step 3: Cross multiply
    78,723.80x = 118,104.30 × 31,341.61
  4. Step 4: Simplify right side
    78,723.80x = 3,701,578,813.53
  5. Step 5: Solve for x
    x = 3,701,578,813.53/78,723.80
  6. Step 6: Final answer
    x = 47,019.82

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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.