Home / 67,187.81-100,778.10-20,437.05

Finding the Fourth Proportional to 67,187.81, 100,778.10 and 20,437.05

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Solution

The fourth proportional to 67,187.81, 100,778.10 and 20,437.05 is: 30,654.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,187.81 : 100,778.10 = 20,437.05 : x
  2. Step 2: Convert to fraction form
    67,187.81/100,778.10 = 20,437.05/x
  3. Step 3: Cross multiply
    67,187.81x = 100,778.10 × 20,437.05
  4. Step 4: Simplify right side
    67,187.81x = 2,059,606,966.42
  5. Step 5: Solve for x
    x = 2,059,606,966.42/67,187.81
  6. Step 6: Final answer
    x = 30,654.47

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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.