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Finding the Fourth Proportional to 210,000.80, 315,001.20 and 135,205.40

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Solution

The fourth proportional to 210,000.80, 315,001.20 and 135,205.40 is: 202,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,000.80 : 315,001.20 = 135,205.40 : x
  2. Step 2: Convert to fraction form
    210,000.80/315,001.20 = 135,205.40/x
  3. Step 3: Cross multiply
    210,000.80x = 315,001.20 × 135,205.40
  4. Step 4: Simplify right side
    210,000.80x = 42,589,863,246.48
  5. Step 5: Solve for x
    x = 42,589,863,246.48/210,000.80
  6. Step 6: Final answer
    x = 202,808.10

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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.