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Finding the Fourth Proportional to 74,471.80, 111,710.40 and 21,886.60

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Solution

The fourth proportional to 74,471.80, 111,710.40 and 21,886.60 is: 32,830.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,471.80 : 111,710.40 = 21,886.60 : x
  2. Step 2: Convert to fraction form
    74,471.80/111,710.40 = 21,886.60/x
  3. Step 3: Cross multiply
    74,471.80x = 111,710.40 × 21,886.60
  4. Step 4: Simplify right side
    74,471.80x = 2,444,960,840.64
  5. Step 5: Solve for x
    x = 2,444,960,840.64/74,471.80
  6. Step 6: Final answer
    x = 32,830.69

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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.