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Finding the Fourth Proportional to 141,813.70, 212,720.55 and 89,455.30

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Solution

The fourth proportional to 141,813.70, 212,720.55 and 89,455.30 is: 134,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,813.70 : 212,720.55 = 89,455.30 : x
  2. Step 2: Convert to fraction form
    141,813.70/212,720.55 = 89,455.30/x
  3. Step 3: Cross multiply
    141,813.70x = 212,720.55 × 89,455.30
  4. Step 4: Simplify right side
    141,813.70x = 19,028,980,616.42
  5. Step 5: Solve for x
    x = 19,028,980,616.42/141,813.70
  6. Step 6: Final answer
    x = 134,182.95

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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.