Home / 109,140.90-150,623.19-61,391.40

Finding the Fourth Proportional to 109,140.90, 150,623.19 and 61,391.40

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Solution

The fourth proportional to 109,140.90, 150,623.19 and 61,391.40 is: 84,725.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,140.90 : 150,623.19 = 61,391.40 : x
  2. Step 2: Convert to fraction form
    109,140.90/150,623.19 = 61,391.40/x
  3. Step 3: Cross multiply
    109,140.90x = 150,623.19 × 61,391.40
  4. Step 4: Simplify right side
    109,140.90x = 9,246,968,506.57
  5. Step 5: Solve for x
    x = 9,246,968,506.57/109,140.90
  6. Step 6: Final answer
    x = 84,725.05

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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.