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Finding the Fourth Proportional to 69,982.72, 104,870.40 and 57,590.80

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Solution

The fourth proportional to 69,982.72, 104,870.40 and 57,590.80 is: 86,300.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,982.72 : 104,870.40 = 57,590.80 : x
  2. Step 2: Convert to fraction form
    69,982.72/104,870.40 = 57,590.80/x
  3. Step 3: Cross multiply
    69,982.72x = 104,870.40 × 57,590.80
  4. Step 4: Simplify right side
    69,982.72x = 6,039,570,232.32
  5. Step 5: Solve for x
    x = 6,039,570,232.32/69,982.72
  6. Step 6: Final answer
    x = 86,300.88

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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.