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Finding the Fourth Proportional to 69,901.56, 96,467.55 and 39,686.31

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Solution

The fourth proportional to 69,901.56, 96,467.55 and 39,686.31 is: 54,769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,901.56 : 96,467.55 = 39,686.31 : x
  2. Step 2: Convert to fraction form
    69,901.56/96,467.55 = 39,686.31/x
  3. Step 3: Cross multiply
    69,901.56x = 96,467.55 × 39,686.31
  4. Step 4: Simplify right side
    69,901.56x = 3,828,441,094.24
  5. Step 5: Solve for x
    x = 3,828,441,094.24/69,901.56
  6. Step 6: Final answer
    x = 54,769.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.