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Finding the Fourth Proportional to 111,019.61, 166,531.48 and 36,139.50

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Solution

The fourth proportional to 111,019.61, 166,531.48 and 36,139.50 is: 54,209.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,019.61 : 166,531.48 = 36,139.50 : x
  2. Step 2: Convert to fraction form
    111,019.61/166,531.48 = 36,139.50/x
  3. Step 3: Cross multiply
    111,019.61x = 166,531.48 × 36,139.50
  4. Step 4: Simplify right side
    111,019.61x = 6,018,364,331.11
  5. Step 5: Solve for x
    x = 6,018,364,331.11/111,019.61
  6. Step 6: Final answer
    x = 54,209.92

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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.