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Finding the Fourth Proportional to 66,009.52, 99,020.04 and 30,930.40

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Solution

The fourth proportional to 66,009.52, 99,020.04 and 30,930.40 is: 46,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,009.52 : 99,020.04 = 30,930.40 : x
  2. Step 2: Convert to fraction form
    66,009.52/99,020.04 = 30,930.40/x
  3. Step 3: Cross multiply
    66,009.52x = 99,020.04 × 30,930.40
  4. Step 4: Simplify right side
    66,009.52x = 3,062,729,445.22
  5. Step 5: Solve for x
    x = 3,062,729,445.22/66,009.52
  6. Step 6: Final answer
    x = 46,398.30

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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.