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Finding the Fourth Proportional to 199,341.60, 299,012.40 and 128,839.20

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Solution

The fourth proportional to 199,341.60, 299,012.40 and 128,839.20 is: 193,258.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,341.60 : 299,012.40 = 128,839.20 : x
  2. Step 2: Convert to fraction form
    199,341.60/299,012.40 = 128,839.20/x
  3. Step 3: Cross multiply
    199,341.60x = 299,012.40 × 128,839.20
  4. Step 4: Simplify right side
    199,341.60x = 38,524,518,406.08
  5. Step 5: Solve for x
    x = 38,524,518,406.08/199,341.60
  6. Step 6: Final answer
    x = 193,258.80

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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.