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Finding the Fourth Proportional to 99,078.62, 148,421.09 and 54,595.04

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Solution

The fourth proportional to 99,078.62, 148,421.09 and 54,595.04 is: 81,784.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,078.62 : 148,421.09 = 54,595.04 : x
  2. Step 2: Convert to fraction form
    99,078.62/148,421.09 = 54,595.04/x
  3. Step 3: Cross multiply
    99,078.62x = 148,421.09 × 54,595.04
  4. Step 4: Simplify right side
    99,078.62x = 8,103,054,330.31
  5. Step 5: Solve for x
    x = 8,103,054,330.31/99,078.62
  6. Step 6: Final answer
    x = 81,784.09

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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.