Home / 78,911.08-118,288.70-31,497.61

Finding the Fourth Proportional to 78,911.08, 118,288.70 and 31,497.61

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Solution

The fourth proportional to 78,911.08, 118,288.70 and 31,497.61 is: 47,215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.08 : 118,288.70 = 31,497.61 : x
  2. Step 2: Convert to fraction form
    78,911.08/118,288.70 = 31,497.61/x
  3. Step 3: Cross multiply
    78,911.08x = 118,288.70 × 31,497.61
  4. Step 4: Simplify right side
    78,911.08x = 3,725,810,591.08
  5. Step 5: Solve for x
    x = 3,725,810,591.08/78,911.08
  6. Step 6: Final answer
    x = 47,215.31

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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.