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Finding the Fourth Proportional to 202,809.80, 304,214.70 and 128,014.40

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Solution

The fourth proportional to 202,809.80, 304,214.70 and 128,014.40 is: 192,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,809.80 : 304,214.70 = 128,014.40 : x
  2. Step 2: Convert to fraction form
    202,809.80/304,214.70 = 128,014.40/x
  3. Step 3: Cross multiply
    202,809.80x = 304,214.70 × 128,014.40
  4. Step 4: Simplify right side
    202,809.80x = 38,943,862,291.68
  5. Step 5: Solve for x
    x = 38,943,862,291.68/202,809.80
  6. Step 6: Final answer
    x = 192,021.60

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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.