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Finding the Fourth Proportional to 202,808.30, 304,212.45 and 128,012.90

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Solution

The fourth proportional to 202,808.30, 304,212.45 and 128,012.90 is: 192,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,808.30 : 304,212.45 = 128,012.90 : x
  2. Step 2: Convert to fraction form
    202,808.30/304,212.45 = 128,012.90/x
  3. Step 3: Cross multiply
    202,808.30x = 304,212.45 × 128,012.90
  4. Step 4: Simplify right side
    202,808.30x = 38,943,117,940.61
  5. Step 5: Solve for x
    x = 38,943,117,940.61/202,808.30
  6. Step 6: Final answer
    x = 192,019.35

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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.