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Finding the Fourth Proportional to 73,575.78, 110,364.69 and 20,985.27

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Solution

The fourth proportional to 73,575.78, 110,364.69 and 20,985.27 is: 31,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,575.78 : 110,364.69 = 20,985.27 : x
  2. Step 2: Convert to fraction form
    73,575.78/110,364.69 = 20,985.27/x
  3. Step 3: Cross multiply
    73,575.78x = 110,364.69 × 20,985.27
  4. Step 4: Simplify right side
    73,575.78x = 2,316,032,818.12
  5. Step 5: Solve for x
    x = 2,316,032,818.12/73,575.78
  6. Step 6: Final answer
    x = 31,478.20

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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.