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Finding the Fourth Proportional to 56,909.20, 85,338.20 and 21,837.20

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Solution

The fourth proportional to 56,909.20, 85,338.20 and 21,837.20 is: 32,745.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,909.20 : 85,338.20 = 21,837.20 : x
  2. Step 2: Convert to fraction form
    56,909.20/85,338.20 = 21,837.20/x
  3. Step 3: Cross multiply
    56,909.20x = 85,338.20 × 21,837.20
  4. Step 4: Simplify right side
    56,909.20x = 1,863,547,341.04
  5. Step 5: Solve for x
    x = 1,863,547,341.04/56,909.20
  6. Step 6: Final answer
    x = 32,745.98

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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.