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Finding the Fourth Proportional to 72,868.40, 109,302.60 and 41,706.80

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Solution

The fourth proportional to 72,868.40, 109,302.60 and 41,706.80 is: 62,560.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,868.40 : 109,302.60 = 41,706.80 : x
  2. Step 2: Convert to fraction form
    72,868.40/109,302.60 = 41,706.80/x
  3. Step 3: Cross multiply
    72,868.40x = 109,302.60 × 41,706.80
  4. Step 4: Simplify right side
    72,868.40x = 4,558,661,677.68
  5. Step 5: Solve for x
    x = 4,558,661,677.68/72,868.40
  6. Step 6: Final answer
    x = 62,560.20

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1.5x scale

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.