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Finding the Fourth Proportional to 84,647.35, 126,972.11 and 58,345.03

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Solution

The fourth proportional to 84,647.35, 126,972.11 and 58,345.03 is: 87,518.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,647.35 : 126,972.11 = 58,345.03 : x
  2. Step 2: Convert to fraction form
    84,647.35/126,972.11 = 58,345.03/x
  3. Step 3: Cross multiply
    84,647.35x = 126,972.11 × 58,345.03
  4. Step 4: Simplify right side
    84,647.35x = 7,408,191,567.11
  5. Step 5: Solve for x
    x = 7,408,191,567.11/84,647.35
  6. Step 6: Final answer
    x = 87,518.29

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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.