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Finding the Fourth Proportional to 78,107.90, 107,782.79 and 44,119.79

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Solution

The fourth proportional to 78,107.90, 107,782.79 and 44,119.79 is: 60,881.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,107.90 : 107,782.79 = 44,119.79 : x
  2. Step 2: Convert to fraction form
    78,107.90/107,782.79 = 44,119.79/x
  3. Step 3: Cross multiply
    78,107.90x = 107,782.79 × 44,119.79
  4. Step 4: Simplify right side
    78,107.90x = 4,755,353,705.09
  5. Step 5: Solve for x
    x = 4,755,353,705.09/78,107.90
  6. Step 6: Final answer
    x = 60,881.86

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1.5x scale

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.