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Finding the Fourth Proportional to 218,305, 327,561.18 and 70,561

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Solution

The fourth proportional to 218,305, 327,561.18 and 70,561 is: 105,875.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,305 : 327,561.18 = 70,561 : x
  2. Step 2: Convert to fraction form
    218,305/327,561.18 = 70,561/x
  3. Step 3: Cross multiply
    218,305x = 327,561.18 × 70,561
  4. Step 4: Simplify right side
    218,305x = 23,113,044,421.98
  5. Step 5: Solve for x
    x = 23,113,044,421.98/218,305
  6. Step 6: Final answer
    x = 105,875.01

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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.