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Finding the Fourth Proportional to 206,973.20, 310,459.80 and 136,114.40

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Solution

The fourth proportional to 206,973.20, 310,459.80 and 136,114.40 is: 204,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,973.20 : 310,459.80 = 136,114.40 : x
  2. Step 2: Convert to fraction form
    206,973.20/310,459.80 = 136,114.40/x
  3. Step 3: Cross multiply
    206,973.20x = 310,459.80 × 136,114.40
  4. Step 4: Simplify right side
    206,973.20x = 42,258,049,401.12
  5. Step 5: Solve for x
    x = 42,258,049,401.12/206,973.20
  6. Step 6: Final answer
    x = 204,171.60

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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.