Home / 128,706.23-177,417.72-90,358.19

Finding the Fourth Proportional to 128,706.23, 177,417.72 and 90,358.19

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Solution

The fourth proportional to 128,706.23, 177,417.72 and 90,358.19 is: 124,556.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,706.23 : 177,417.72 = 90,358.19 : x
  2. Step 2: Convert to fraction form
    128,706.23/177,417.72 = 90,358.19/x
  3. Step 3: Cross multiply
    128,706.23x = 177,417.72 × 90,358.19
  4. Step 4: Simplify right side
    128,706.23x = 16,031,143,601.34
  5. Step 5: Solve for x
    x = 16,031,143,601.34/128,706.23
  6. Step 6: Final answer
    x = 124,556.09

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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.