Home / 109,121.45-150,502.05-74,686.59

Finding the Fourth Proportional to 109,121.45, 150,502.05 and 74,686.59

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Solution

The fourth proportional to 109,121.45, 150,502.05 and 74,686.59 is: 103,008.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,121.45 : 150,502.05 = 74,686.59 : x
  2. Step 2: Convert to fraction form
    109,121.45/150,502.05 = 74,686.59/x
  3. Step 3: Cross multiply
    109,121.45x = 150,502.05 × 74,686.59
  4. Step 4: Simplify right side
    109,121.45x = 11,240,484,902.51
  5. Step 5: Solve for x
    x = 11,240,484,902.51/109,121.45
  6. Step 6: Final answer
    x = 103,008.94

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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.