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Finding the Fourth Proportional to 56,987.80, 85,429.43 and 21,901.03

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Solution

The fourth proportional to 56,987.80, 85,429.43 and 21,901.03 is: 32,831.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,987.80 : 85,429.43 = 21,901.03 : x
  2. Step 2: Convert to fraction form
    56,987.80/85,429.43 = 21,901.03/x
  3. Step 3: Cross multiply
    56,987.80x = 85,429.43 × 21,901.03
  4. Step 4: Simplify right side
    56,987.80x = 1,870,992,872.10
  5. Step 5: Solve for x
    x = 1,870,992,872.10/56,987.80
  6. Step 6: Final answer
    x = 32,831.46

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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.