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Finding the Fourth Proportional to 218,720.40, 328,040.10 and 60,916.20

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Solution

The fourth proportional to 218,720.40, 328,040.10 and 60,916.20 is: 91,363.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,720.40 : 328,040.10 = 60,916.20 : x
  2. Step 2: Convert to fraction form
    218,720.40/328,040.10 = 60,916.20/x
  3. Step 3: Cross multiply
    218,720.40x = 328,040.10 × 60,916.20
  4. Step 4: Simplify right side
    218,720.40x = 19,982,956,339.62
  5. Step 5: Solve for x
    x = 19,982,956,339.62/218,720.40
  6. Step 6: Final answer
    x = 91,363.02

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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.