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Finding the Fourth Proportional to 71,787.01, 99,064.39 and 39,955.22

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Solution

The fourth proportional to 71,787.01, 99,064.39 and 39,955.22 is: 55,137.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,787.01 : 99,064.39 = 39,955.22 : x
  2. Step 2: Convert to fraction form
    71,787.01/99,064.39 = 39,955.22/x
  3. Step 3: Cross multiply
    71,787.01x = 99,064.39 × 39,955.22
  4. Step 4: Simplify right side
    71,787.01x = 3,958,139,296.84
  5. Step 5: Solve for x
    x = 3,958,139,296.84/71,787.01
  6. Step 6: Final answer
    x = 55,137.27

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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.