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Finding the Fourth Proportional to 78,624.40, 117,891.12 and 26,019.76

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Solution

The fourth proportional to 78,624.40, 117,891.12 and 26,019.76 is: 39,014.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,624.40 : 117,891.12 = 26,019.76 : x
  2. Step 2: Convert to fraction form
    78,624.40/117,891.12 = 26,019.76/x
  3. Step 3: Cross multiply
    78,624.40x = 117,891.12 × 26,019.76
  4. Step 4: Simplify right side
    78,624.40x = 3,067,498,648.53
  5. Step 5: Solve for x
    x = 3,067,498,648.53/78,624.40
  6. Step 6: Final answer
    x = 39,014.59

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1.5x scale

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.