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Finding the Fourth Proportional to 77,081.67, 115,641.90 and 21,677.67

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Solution

The fourth proportional to 77,081.67, 115,641.90 and 21,677.67 is: 32,521.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,081.67 : 115,641.90 = 21,677.67 : x
  2. Step 2: Convert to fraction form
    77,081.67/115,641.90 = 21,677.67/x
  3. Step 3: Cross multiply
    77,081.67x = 115,641.90 × 21,677.67
  4. Step 4: Simplify right side
    77,081.67x = 2,506,846,946.37
  5. Step 5: Solve for x
    x = 2,506,846,946.37/77,081.67
  6. Step 6: Final answer
    x = 32,521.96

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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.