Home / 145,020.57-217,522.07-86,230.36

Finding the Fourth Proportional to 145,020.57, 217,522.07 and 86,230.36

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Solution

The fourth proportional to 145,020.57, 217,522.07 and 86,230.36 is: 129,340.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,020.57 : 217,522.07 = 86,230.36 : x
  2. Step 2: Convert to fraction form
    145,020.57/217,522.07 = 86,230.36/x
  3. Step 3: Cross multiply
    145,020.57x = 217,522.07 × 86,230.36
  4. Step 4: Simplify right side
    145,020.57x = 18,757,006,404.05
  5. Step 5: Solve for x
    x = 18,757,006,404.05/145,020.57
  6. Step 6: Final answer
    x = 129,340.32

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1.5x scale

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.