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Finding the Fourth Proportional to 60,902.80, 91,369.95 and 18,781.94

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Solution

The fourth proportional to 60,902.80, 91,369.95 and 18,781.94 is: 28,177.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,902.80 : 91,369.95 = 18,781.94 : x
  2. Step 2: Convert to fraction form
    60,902.80/91,369.95 = 18,781.94/x
  3. Step 3: Cross multiply
    60,902.80x = 91,369.95 × 18,781.94
  4. Step 4: Simplify right side
    60,902.80x = 1,716,104,918.70
  5. Step 5: Solve for x
    x = 1,716,104,918.70/60,902.80
  6. Step 6: Final answer
    x = 28,177.77

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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.