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Finding the Fourth Proportional to 70,969.10, 106,435.49 and 21,037.53

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Solution

The fourth proportional to 70,969.10, 106,435.49 and 21,037.53 is: 31,550.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,969.10 : 106,435.49 = 21,037.53 : x
  2. Step 2: Convert to fraction form
    70,969.10/106,435.49 = 21,037.53/x
  3. Step 3: Cross multiply
    70,969.10x = 106,435.49 × 21,037.53
  4. Step 4: Simplify right side
    70,969.10x = 2,239,139,866.53
  5. Step 5: Solve for x
    x = 2,239,139,866.53/70,969.10
  6. Step 6: Final answer
    x = 31,550.91

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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.