Home / 221,318.72-305,332.80-136,288.16

Finding the Fourth Proportional to 221,318.72, 305,332.80 and 136,288.16

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Solution

The fourth proportional to 221,318.72, 305,332.80 and 136,288.16 is: 188,024.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,318.72 : 305,332.80 = 136,288.16 : x
  2. Step 2: Convert to fraction form
    221,318.72/305,332.80 = 136,288.16/x
  3. Step 3: Cross multiply
    221,318.72x = 305,332.80 × 136,288.16
  4. Step 4: Simplify right side
    221,318.72x = 41,613,245,499.65
  5. Step 5: Solve for x
    x = 41,613,245,499.65/221,318.72
  6. Step 6: Final answer
    x = 188,024.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.