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Finding the Fourth Proportional to 78,220.70, 107,943.91 and 44,235.85

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Solution

The fourth proportional to 78,220.70, 107,943.91 and 44,235.85 is: 61,045.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,220.70 : 107,943.91 = 44,235.85 : x
  2. Step 2: Convert to fraction form
    78,220.70/107,943.91 = 44,235.85/x
  3. Step 3: Cross multiply
    78,220.70x = 107,943.91 × 44,235.85
  4. Step 4: Simplify right side
    78,220.70x = 4,774,990,659.85
  5. Step 5: Solve for x
    x = 4,774,990,659.85/78,220.70
  6. Step 6: Final answer
    x = 61,045.11

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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.