Home / 90,868.68-125,411.22-57,431.88

Finding the Fourth Proportional to 90,868.68, 125,411.22 and 57,431.88

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Solution

The fourth proportional to 90,868.68, 125,411.22 and 57,431.88 is: 79,263.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,868.68 : 125,411.22 = 57,431.88 : x
  2. Step 2: Convert to fraction form
    90,868.68/125,411.22 = 57,431.88/x
  3. Step 3: Cross multiply
    90,868.68x = 125,411.22 × 57,431.88
  4. Step 4: Simplify right side
    90,868.68x = 7,202,602,137.69
  5. Step 5: Solve for x
    x = 7,202,602,137.69/90,868.68
  6. Step 6: Final answer
    x = 79,263.86

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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.