Home / 74,390.13-102,658.05-40,398.35

Finding the Fourth Proportional to 74,390.13, 102,658.05 and 40,398.35

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Solution

The fourth proportional to 74,390.13, 102,658.05 and 40,398.35 is: 55,749.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,390.13 : 102,658.05 = 40,398.35 : x
  2. Step 2: Convert to fraction form
    74,390.13/102,658.05 = 40,398.35/x
  3. Step 3: Cross multiply
    74,390.13x = 102,658.05 × 40,398.35
  4. Step 4: Simplify right side
    74,390.13x = 4,147,215,320.93
  5. Step 5: Solve for x
    x = 4,147,215,320.93/74,390.13
  6. Step 6: Final answer
    x = 55,749.54

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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.