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Finding the Fourth Proportional to 72,907.13, 100,611.83 and 39,373.13

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Solution

The fourth proportional to 72,907.13, 100,611.83 and 39,373.13 is: 54,334.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907.13 : 100,611.83 = 39,373.13 : x
  2. Step 2: Convert to fraction form
    72,907.13/100,611.83 = 39,373.13/x
  3. Step 3: Cross multiply
    72,907.13x = 100,611.83 × 39,373.13
  4. Step 4: Simplify right side
    72,907.13x = 3,961,402,662.13
  5. Step 5: Solve for x
    x = 3,961,402,662.13/72,907.13
  6. Step 6: Final answer
    x = 54,334.91

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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.