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Finding the Fourth Proportional to 85,128.81, 127,700.55 and 21,948.37

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Solution

The fourth proportional to 85,128.81, 127,700.55 and 21,948.37 is: 32,924.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128.81 : 127,700.55 = 21,948.37 : x
  2. Step 2: Convert to fraction form
    85,128.81/127,700.55 = 21,948.37/x
  3. Step 3: Cross multiply
    85,128.81x = 127,700.55 × 21,948.37
  4. Step 4: Simplify right side
    85,128.81x = 2,802,818,601.35
  5. Step 5: Solve for x
    x = 2,802,818,601.35/85,128.81
  6. Step 6: Final answer
    x = 32,924.44

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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.