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Finding the Fourth Proportional to 73,599.13, 110,399.78 and 21,008.65

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Solution

The fourth proportional to 73,599.13, 110,399.78 and 21,008.65 is: 31,513.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,599.13 : 110,399.78 = 21,008.65 : x
  2. Step 2: Convert to fraction form
    73,599.13/110,399.78 = 21,008.65/x
  3. Step 3: Cross multiply
    73,599.13x = 110,399.78 × 21,008.65
  4. Step 4: Simplify right side
    73,599.13x = 2,319,349,681.05
  5. Step 5: Solve for x
    x = 2,319,349,681.05/73,599.13
  6. Step 6: Final answer
    x = 31,513.28

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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.