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Finding the Fourth Proportional to 56,572.62, 84,869.88 and 19,138.79

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Solution

The fourth proportional to 56,572.62, 84,869.88 and 19,138.79 is: 28,711.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,572.62 : 84,869.88 = 19,138.79 : x
  2. Step 2: Convert to fraction form
    56,572.62/84,869.88 = 19,138.79/x
  3. Step 3: Cross multiply
    56,572.62x = 84,869.88 × 19,138.79
  4. Step 4: Simplify right side
    56,572.62x = 1,624,307,070.40
  5. Step 5: Solve for x
    x = 1,624,307,070.40/56,572.62
  6. Step 6: Final answer
    x = 28,711.89

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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.