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Finding the Fourth Proportional to 56,752.30, 85,128.90 and 17,309.80

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Solution

The fourth proportional to 56,752.30, 85,128.90 and 17,309.80 is: 25,964.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,752.30 : 85,128.90 = 17,309.80 : x
  2. Step 2: Convert to fraction form
    56,752.30/85,128.90 = 17,309.80/x
  3. Step 3: Cross multiply
    56,752.30x = 85,128.90 × 17,309.80
  4. Step 4: Simplify right side
    56,752.30x = 1,473,564,233.22
  5. Step 5: Solve for x
    x = 1,473,564,233.22/56,752.30
  6. Step 6: Final answer
    x = 25,964.84

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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.