Home / 128,174.81-192,301.14-90,807.18

Finding the Fourth Proportional to 128,174.81, 192,301.14 and 90,807.18

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Solution

The fourth proportional to 128,174.81, 192,301.14 and 90,807.18 is: 136,238.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,174.81 : 192,301.14 = 90,807.18 : x
  2. Step 2: Convert to fraction form
    128,174.81/192,301.14 = 90,807.18/x
  3. Step 3: Cross multiply
    128,174.81x = 192,301.14 × 90,807.18
  4. Step 4: Simplify right side
    128,174.81x = 17,462,324,234.19
  5. Step 5: Solve for x
    x = 17,462,324,234.19/128,174.81
  6. Step 6: Final answer
    x = 136,238.35

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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.