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Finding the Fourth Proportional to 70,969.48, 106,436.06 and 21,037.91

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Solution

The fourth proportional to 70,969.48, 106,436.06 and 21,037.91 is: 31,551.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,969.48 : 106,436.06 = 21,037.91 : x
  2. Step 2: Convert to fraction form
    70,969.48/106,436.06 = 21,037.91/x
  3. Step 3: Cross multiply
    70,969.48x = 106,436.06 × 21,037.91
  4. Step 4: Simplify right side
    70,969.48x = 2,239,191,692.56
  5. Step 5: Solve for x
    x = 2,239,191,692.56/70,969.48
  6. Step 6: Final answer
    x = 31,551.47

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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.