Home / 100,890.89-139,217.24-57,868.16

Finding the Fourth Proportional to 100,890.89, 139,217.24 and 57,868.16

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Solution

The fourth proportional to 100,890.89, 139,217.24 and 57,868.16 is: 79,851.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,890.89 : 139,217.24 = 57,868.16 : x
  2. Step 2: Convert to fraction form
    100,890.89/139,217.24 = 57,868.16/x
  3. Step 3: Cross multiply
    100,890.89x = 139,217.24 × 57,868.16
  4. Step 4: Simplify right side
    100,890.89x = 8,056,244,533.65
  5. Step 5: Solve for x
    x = 8,056,244,533.65/100,890.89
  6. Step 6: Final answer
    x = 79,851.06

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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.