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Finding the Fourth Proportional to 52,756.40, 79,145.40 and 17,721.20

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Solution

The fourth proportional to 52,756.40, 79,145.40 and 17,721.20 is: 26,585.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,756.40 : 79,145.40 = 17,721.20 : x
  2. Step 2: Convert to fraction form
    52,756.40/79,145.40 = 17,721.20/x
  3. Step 3: Cross multiply
    52,756.40x = 79,145.40 × 17,721.20
  4. Step 4: Simplify right side
    52,756.40x = 1,402,551,462.48
  5. Step 5: Solve for x
    x = 1,402,551,462.48/52,756.40
  6. Step 6: Final answer
    x = 26,585.43

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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.