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Finding the Fourth Proportional to 77,118.66, 115,677.81 and 20,966.93

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Solution

The fourth proportional to 77,118.66, 115,677.81 and 20,966.93 is: 31,450.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,118.66 : 115,677.81 = 20,966.93 : x
  2. Step 2: Convert to fraction form
    77,118.66/115,677.81 = 20,966.93/x
  3. Step 3: Cross multiply
    77,118.66x = 115,677.81 × 20,966.93
  4. Step 4: Simplify right side
    77,118.66x = 2,425,408,544.82
  5. Step 5: Solve for x
    x = 2,425,408,544.82/77,118.66
  6. Step 6: Final answer
    x = 31,450.35

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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.