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Finding the Fourth Proportional to 73,210.10, 109,815.15 and 20,618.90

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Solution

The fourth proportional to 73,210.10, 109,815.15 and 20,618.90 is: 30,928.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,210.10 : 109,815.15 = 20,618.90 : x
  2. Step 2: Convert to fraction form
    73,210.10/109,815.15 = 20,618.90/x
  3. Step 3: Cross multiply
    73,210.10x = 109,815.15 × 20,618.90
  4. Step 4: Simplify right side
    73,210.10x = 2,264,267,596.34
  5. Step 5: Solve for x
    x = 2,264,267,596.34/73,210.10
  6. Step 6: Final answer
    x = 30,928.35

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Similar ratio
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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.