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Finding the Fourth Proportional to 84,658.74, 126,992.16 and 69,840.18

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Solution

The fourth proportional to 84,658.74, 126,992.16 and 69,840.18 is: 104,763.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,658.74 : 126,992.16 = 69,840.18 : x
  2. Step 2: Convert to fraction form
    84,658.74/126,992.16 = 69,840.18/x
  3. Step 3: Cross multiply
    84,658.74x = 126,992.16 × 69,840.18
  4. Step 4: Simplify right side
    84,658.74x = 8,869,155,312.99
  5. Step 5: Solve for x
    x = 8,869,155,312.99/84,658.74
  6. Step 6: Final answer
    x = 104,763.61

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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.