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Finding the Fourth Proportional to 72,448.56, 99,987.21 and 48,248.19

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Solution

The fourth proportional to 72,448.56, 99,987.21 and 48,248.19 is: 66,587.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,448.56 : 99,987.21 = 48,248.19 : x
  2. Step 2: Convert to fraction form
    72,448.56/99,987.21 = 48,248.19/x
  3. Step 3: Cross multiply
    72,448.56x = 99,987.21 × 48,248.19
  4. Step 4: Simplify right side
    72,448.56x = 4,824,201,905.65
  5. Step 5: Solve for x
    x = 4,824,201,905.65/72,448.56
  6. Step 6: Final answer
    x = 66,587.96

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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.