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Finding the Fourth Proportional to 72,551, 100,120.74 and 42,357.26

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Solution

The fourth proportional to 72,551, 100,120.74 and 42,357.26 is: 58,453.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,551 : 100,120.74 = 42,357.26 : x
  2. Step 2: Convert to fraction form
    72,551/100,120.74 = 42,357.26/x
  3. Step 3: Cross multiply
    72,551x = 100,120.74 × 42,357.26
  4. Step 4: Simplify right side
    72,551x = 4,240,840,215.57
  5. Step 5: Solve for x
    x = 4,240,840,215.57/72,551
  6. Step 6: Final answer
    x = 58,453.23

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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.