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Finding the Fourth Proportional to 56,891.40, 85,339.08 and 21,349.11

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Solution

The fourth proportional to 56,891.40, 85,339.08 and 21,349.11 is: 32,024.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,891.40 : 85,339.08 = 21,349.11 : x
  2. Step 2: Convert to fraction form
    56,891.40/85,339.08 = 21,349.11/x
  3. Step 3: Cross multiply
    56,891.40x = 85,339.08 × 21,349.11
  4. Step 4: Simplify right side
    56,891.40x = 1,821,913,406.22
  5. Step 5: Solve for x
    x = 1,821,913,406.22/56,891.40
  6. Step 6: Final answer
    x = 32,024.41

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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.