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Finding the Fourth Proportional to 56,885.80, 85,322.78 and 15,330.28

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Solution

The fourth proportional to 56,885.80, 85,322.78 and 15,330.28 is: 22,993.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,885.80 : 85,322.78 = 15,330.28 : x
  2. Step 2: Convert to fraction form
    56,885.80/85,322.78 = 15,330.28/x
  3. Step 3: Cross multiply
    56,885.80x = 85,322.78 × 15,330.28
  4. Step 4: Simplify right side
    56,885.80x = 1,308,022,107.78
  5. Step 5: Solve for x
    x = 1,308,022,107.78/56,885.80
  6. Step 6: Final answer
    x = 22,993.82

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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.