Home / 109,128.36-150,595.68-61,381.72

Finding the Fourth Proportional to 109,128.36, 150,595.68 and 61,381.72

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Solution

The fourth proportional to 109,128.36, 150,595.68 and 61,381.72 is: 84,705.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,128.36 : 150,595.68 = 61,381.72 : x
  2. Step 2: Convert to fraction form
    109,128.36/150,595.68 = 61,381.72/x
  3. Step 3: Cross multiply
    109,128.36x = 150,595.68 × 61,381.72
  4. Step 4: Simplify right side
    109,128.36x = 9,243,821,862.97
  5. Step 5: Solve for x
    x = 9,243,821,862.97/109,128.36
  6. Step 6: Final answer
    x = 84,705.95

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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.