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Finding the Fourth Proportional to 99,189.69, 136,923.65 and 66,967.95

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Solution

The fourth proportional to 99,189.69, 136,923.65 and 66,967.95 is: 92,444.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,189.69 : 136,923.65 = 66,967.95 : x
  2. Step 2: Convert to fraction form
    99,189.69/136,923.65 = 66,967.95/x
  3. Step 3: Cross multiply
    99,189.69x = 136,923.65 × 66,967.95
  4. Step 4: Simplify right side
    99,189.69x = 9,169,496,953.47
  5. Step 5: Solve for x
    x = 9,169,496,953.47/99,189.69
  6. Step 6: Final answer
    x = 92,444.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.