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Finding the Fourth Proportional to 61,011.40, 84,356.38 and 53,436

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Solution

The fourth proportional to 61,011.40, 84,356.38 and 53,436 is: 73,882.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,011.40 : 84,356.38 = 53,436 : x
  2. Step 2: Convert to fraction form
    61,011.40/84,356.38 = 53,436/x
  3. Step 3: Cross multiply
    61,011.40x = 84,356.38 × 53,436
  4. Step 4: Simplify right side
    61,011.40x = 4,507,667,521.68
  5. Step 5: Solve for x
    x = 4,507,667,521.68/61,011.40
  6. Step 6: Final answer
    x = 73,882.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.