Home / 90,567.87-136,073.21-85,532.37

Finding the Fourth Proportional to 90,567.87, 136,073.21 and 85,532.37

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Solution

The fourth proportional to 90,567.87, 136,073.21 and 85,532.37 is: 128,507.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,567.87 : 136,073.21 = 85,532.37 : x
  2. Step 2: Convert to fraction form
    90,567.87/136,073.21 = 85,532.37/x
  3. Step 3: Cross multiply
    90,567.87x = 136,073.21 × 85,532.37
  4. Step 4: Simplify right side
    90,567.87x = 11,638,663,717.15
  5. Step 5: Solve for x
    x = 11,638,663,717.15/90,567.87
  6. Step 6: Final answer
    x = 128,507.65

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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.