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Finding the Fourth Proportional to 225,142.01, 310,665.53 and 128,358.35

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Solution

The fourth proportional to 225,142.01, 310,665.53 and 128,358.35 is: 177,117.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,142.01 : 310,665.53 = 128,358.35 : x
  2. Step 2: Convert to fraction form
    225,142.01/310,665.53 = 128,358.35/x
  3. Step 3: Cross multiply
    225,142.01x = 310,665.53 × 128,358.35
  4. Step 4: Simplify right side
    225,142.01x = 39,876,514,832.68
  5. Step 5: Solve for x
    x = 39,876,514,832.68/225,142.01
  6. Step 6: Final answer
    x = 177,117.17

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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.