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Finding the Fourth Proportional to 210,057.82, 315,127.74 and 67,938.40

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Solution

The fourth proportional to 210,057.82, 315,127.74 and 67,938.40 is: 101,920.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,057.82 : 315,127.74 = 67,938.40 : x
  2. Step 2: Convert to fraction form
    210,057.82/315,127.74 = 67,938.40/x
  3. Step 3: Cross multiply
    210,057.82x = 315,127.74 × 67,938.40
  4. Step 4: Simplify right side
    210,057.82x = 21,409,274,451.22
  5. Step 5: Solve for x
    x = 21,409,274,451.22/210,057.82
  6. Step 6: Final answer
    x = 101,920.86

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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.