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Finding the Fourth Proportional to 218,954.76, 328,192.22 and 85,688.55

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Solution

The fourth proportional to 218,954.76, 328,192.22 and 85,688.55 is: 128,438.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,954.76 : 328,192.22 = 85,688.55 : x
  2. Step 2: Convert to fraction form
    218,954.76/328,192.22 = 85,688.55/x
  3. Step 3: Cross multiply
    218,954.76x = 328,192.22 × 85,688.55
  4. Step 4: Simplify right side
    218,954.76x = 28,122,315,024.64
  5. Step 5: Solve for x
    x = 28,122,315,024.64/218,954.76
  6. Step 6: Final answer
    x = 128,438.93

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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.