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Finding the Fourth Proportional to 73,578.94, 110,369.45 and 20,988.42

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Solution

The fourth proportional to 73,578.94, 110,369.45 and 20,988.42 is: 31,482.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,578.94 : 110,369.45 = 20,988.42 : x
  2. Step 2: Convert to fraction form
    73,578.94/110,369.45 = 20,988.42/x
  3. Step 3: Cross multiply
    73,578.94x = 110,369.45 × 20,988.42
  4. Step 4: Simplify right side
    73,578.94x = 2,316,480,513.12
  5. Step 5: Solve for x
    x = 2,316,480,513.12/73,578.94
  6. Step 6: Final answer
    x = 31,482.93

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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.