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Finding the Fourth Proportional to 145,510, 217,859.46 and 74,279.40

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Solution

The fourth proportional to 145,510, 217,859.46 and 74,279.40 is: 111,212.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,510 : 217,859.46 = 74,279.40 : x
  2. Step 2: Convert to fraction form
    145,510/217,859.46 = 74,279.40/x
  3. Step 3: Cross multiply
    145,510x = 217,859.46 × 74,279.40
  4. Step 4: Simplify right side
    145,510x = 16,182,469,973.12
  5. Step 5: Solve for x
    x = 16,182,469,973.12/145,510
  6. Step 6: Final answer
    x = 111,212.08

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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.