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Finding the Fourth Proportional to 72,331.90, 99,751.41 and 49,630.84

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Solution

The fourth proportional to 72,331.90, 99,751.41 and 49,630.84 is: 68,444.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,331.90 : 99,751.41 = 49,630.84 : x
  2. Step 2: Convert to fraction form
    72,331.90/99,751.41 = 49,630.84/x
  3. Step 3: Cross multiply
    72,331.90x = 99,751.41 × 49,630.84
  4. Step 4: Simplify right side
    72,331.90x = 4,950,746,269.48
  5. Step 5: Solve for x
    x = 4,950,746,269.48/72,331.90
  6. Step 6: Final answer
    x = 68,444.85

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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.