Home / 78,046.35-117,065.06-21,119.40

Finding the Fourth Proportional to 78,046.35, 117,065.06 and 21,119.40

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Solution

The fourth proportional to 78,046.35, 117,065.06 and 21,119.40 is: 31,677.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,046.35 : 117,065.06 = 21,119.40 : x
  2. Step 2: Convert to fraction form
    78,046.35/117,065.06 = 21,119.40/x
  3. Step 3: Cross multiply
    78,046.35x = 117,065.06 × 21,119.40
  4. Step 4: Simplify right side
    78,046.35x = 2,472,343,722.57
  5. Step 5: Solve for x
    x = 2,472,343,722.57/78,046.35
  6. Step 6: Final answer
    x = 31,677.89

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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.