Home / 90,665.16-136,020.81-53,256.87

Finding the Fourth Proportional to 90,665.16, 136,020.81 and 53,256.87

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Solution

The fourth proportional to 90,665.16, 136,020.81 and 53,256.87 is: 79,898.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,665.16 : 136,020.81 = 53,256.87 : x
  2. Step 2: Convert to fraction form
    90,665.16/136,020.81 = 53,256.87/x
  3. Step 3: Cross multiply
    90,665.16x = 136,020.81 × 53,256.87
  4. Step 4: Simplify right side
    90,665.16x = 7,244,042,038.16
  5. Step 5: Solve for x
    x = 7,244,042,038.16/90,665.16
  6. Step 6: Final answer
    x = 79,898.85

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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.