Home / 90,815.76-136,223.52-28,491.12

Finding the Fourth Proportional to 90,815.76, 136,223.52 and 28,491.12

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Solution

The fourth proportional to 90,815.76, 136,223.52 and 28,491.12 is: 42,736.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,815.76 : 136,223.52 = 28,491.12 : x
  2. Step 2: Convert to fraction form
    90,815.76/136,223.52 = 28,491.12/x
  3. Step 3: Cross multiply
    90,815.76x = 136,223.52 × 28,491.12
  4. Step 4: Simplify right side
    90,815.76x = 3,881,160,655.14
  5. Step 5: Solve for x
    x = 3,881,160,655.14/90,815.76
  6. Step 6: Final answer
    x = 42,736.64

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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.