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Finding the Fourth Proportional to 110,859.30, 166,189.32 and 40,721.40

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Solution

The fourth proportional to 110,859.30, 166,189.32 and 40,721.40 is: 61,045.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,859.30 : 166,189.32 = 40,721.40 : x
  2. Step 2: Convert to fraction form
    110,859.30/166,189.32 = 40,721.40/x
  3. Step 3: Cross multiply
    110,859.30x = 166,189.32 × 40,721.40
  4. Step 4: Simplify right side
    110,859.30x = 6,767,461,775.45
  5. Step 5: Solve for x
    x = 6,767,461,775.45/110,859.30
  6. Step 6: Final answer
    x = 61,045.50

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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.