Home / 78,911.30-118,367.27-19,746.81

Finding the Fourth Proportional to 78,911.30, 118,367.27 and 19,746.81

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Solution

The fourth proportional to 78,911.30, 118,367.27 and 19,746.81 is: 29,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.30 : 118,367.27 = 19,746.81 : x
  2. Step 2: Convert to fraction form
    78,911.30/118,367.27 = 19,746.81/x
  3. Step 3: Cross multiply
    78,911.30x = 118,367.27 × 19,746.81
  4. Step 4: Simplify right side
    78,911.30x = 2,337,375,990.91
  5. Step 5: Solve for x
    x = 2,337,375,990.91/78,911.30
  6. Step 6: Final answer
    x = 29,620.30

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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.