Home / 90,545.78-135,735.51-31,340.04

Finding the Fourth Proportional to 90,545.78, 135,735.51 and 31,340.04

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Solution

The fourth proportional to 90,545.78, 135,735.51 and 31,340.04 is: 46,981.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,545.78 : 135,735.51 = 31,340.04 : x
  2. Step 2: Convert to fraction form
    90,545.78/135,735.51 = 31,340.04/x
  3. Step 3: Cross multiply
    90,545.78x = 135,735.51 × 31,340.04
  4. Step 4: Simplify right side
    90,545.78x = 4,253,956,312.82
  5. Step 5: Solve for x
    x = 4,253,956,312.82/90,545.78
  6. Step 6: Final answer
    x = 46,981.28

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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.