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Finding the Fourth Proportional to 145,115.52, 217,674.36 and 39,940.28

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Solution

The fourth proportional to 145,115.52, 217,674.36 and 39,940.28 is: 59,910.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,115.52 : 217,674.36 = 39,940.28 : x
  2. Step 2: Convert to fraction form
    145,115.52/217,674.36 = 39,940.28/x
  3. Step 3: Cross multiply
    145,115.52x = 217,674.36 × 39,940.28
  4. Step 4: Simplify right side
    145,115.52x = 8,693,974,887.22
  5. Step 5: Solve for x
    x = 8,693,974,887.22/145,115.52
  6. Step 6: Final answer
    x = 59,910.72

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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.