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Finding the Fourth Proportional to 209,041.72, 313,601.47 and 68,810.20

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Solution

The fourth proportional to 209,041.72, 313,601.47 and 68,810.20 is: 103,228.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,041.72 : 313,601.47 = 68,810.20 : x
  2. Step 2: Convert to fraction form
    209,041.72/313,601.47 = 68,810.20/x
  3. Step 3: Cross multiply
    209,041.72x = 313,601.47 × 68,810.20
  4. Step 4: Simplify right side
    209,041.72x = 21,578,979,870.99
  5. Step 5: Solve for x
    x = 21,578,979,870.99/209,041.72
  6. Step 6: Final answer
    x = 103,228.10

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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.