Home / 163,128.81-225,117.39-90,542.82

Finding the Fourth Proportional to 163,128.81, 225,117.39 and 90,542.82

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Solution

The fourth proportional to 163,128.81, 225,117.39 and 90,542.82 is: 124,948.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,128.81 : 225,117.39 = 90,542.82 : x
  2. Step 2: Convert to fraction form
    163,128.81/225,117.39 = 90,542.82/x
  3. Step 3: Cross multiply
    163,128.81x = 225,117.39 × 90,542.82
  4. Step 4: Simplify right side
    163,128.81x = 20,382,763,321.64
  5. Step 5: Solve for x
    x = 20,382,763,321.64/163,128.81
  6. Step 6: Final answer
    x = 124,948.89

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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.