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Finding the Fourth Proportional to 56,572.61, 84,869.84 and 19,138.77

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Solution

The fourth proportional to 56,572.61, 84,869.84 and 19,138.77 is: 28,711.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,572.61 : 84,869.84 = 19,138.77 : x
  2. Step 2: Convert to fraction form
    56,572.61/84,869.84 = 19,138.77/x
  3. Step 3: Cross multiply
    56,572.61x = 84,869.84 × 19,138.77
  4. Step 4: Simplify right side
    56,572.61x = 1,624,304,395.54
  5. Step 5: Solve for x
    x = 1,624,304,395.54/56,572.61
  6. Step 6: Final answer
    x = 28,711.85

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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.