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Finding the Fourth Proportional to 52,398.67, 78,609.61 and 19,118.64

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Solution

The fourth proportional to 52,398.67, 78,609.61 and 19,118.64 is: 28,682.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,398.67 : 78,609.61 = 19,118.64 : x
  2. Step 2: Convert to fraction form
    52,398.67/78,609.61 = 19,118.64/x
  3. Step 3: Cross multiply
    52,398.67x = 78,609.61 × 19,118.64
  4. Step 4: Simplify right side
    52,398.67x = 1,502,908,786.33
  5. Step 5: Solve for x
    x = 1,502,908,786.33/52,398.67
  6. Step 6: Final answer
    x = 28,682.19

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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.