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Finding the Fourth Proportional to 109,039.80, 163,559.70 and 67,049.40

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Solution

The fourth proportional to 109,039.80, 163,559.70 and 67,049.40 is: 100,574.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,039.80 : 163,559.70 = 67,049.40 : x
  2. Step 2: Convert to fraction form
    109,039.80/163,559.70 = 67,049.40/x
  3. Step 3: Cross multiply
    109,039.80x = 163,559.70 × 67,049.40
  4. Step 4: Simplify right side
    109,039.80x = 10,966,579,749.18
  5. Step 5: Solve for x
    x = 10,966,579,749.18/109,039.80
  6. Step 6: Final answer
    x = 100,574.10

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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.