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Finding the Fourth Proportional to 52,718.51, 79,077.80 and 21,553.76

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Solution

The fourth proportional to 52,718.51, 79,077.80 and 21,553.76 is: 32,330.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,718.51 : 79,077.80 = 21,553.76 : x
  2. Step 2: Convert to fraction form
    52,718.51/79,077.80 = 21,553.76/x
  3. Step 3: Cross multiply
    52,718.51x = 79,077.80 × 21,553.76
  4. Step 4: Simplify right side
    52,718.51x = 1,704,424,174.11
  5. Step 5: Solve for x
    x = 1,704,424,174.11/52,718.51
  6. Step 6: Final answer
    x = 32,330.66

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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.