Home / 109,315.10-163,972.72-84,391.56

Finding the Fourth Proportional to 109,315.10, 163,972.72 and 84,391.56

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Solution

The fourth proportional to 109,315.10, 163,972.72 and 84,391.56 is: 126,587.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,315.10 : 163,972.72 = 84,391.56 : x
  2. Step 2: Convert to fraction form
    109,315.10/163,972.72 = 84,391.56/x
  3. Step 3: Cross multiply
    109,315.10x = 163,972.72 × 84,391.56
  4. Step 4: Simplify right side
    109,315.10x = 13,837,913,638.24
  5. Step 5: Solve for x
    x = 13,837,913,638.24/109,315.10
  6. Step 6: Final answer
    x = 126,587.39

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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.