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Finding the Fourth Proportional to 139,988.88, 193,184.64 and 76,326.84

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Solution

The fourth proportional to 139,988.88, 193,184.64 and 76,326.84 is: 105,331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,988.88 : 193,184.64 = 76,326.84 : x
  2. Step 2: Convert to fraction form
    139,988.88/193,184.64 = 76,326.84/x
  3. Step 3: Cross multiply
    139,988.88x = 193,184.64 × 76,326.84
  4. Step 4: Simplify right side
    139,988.88x = 14,745,173,107.74
  5. Step 5: Solve for x
    x = 14,745,173,107.74/139,988.88
  6. Step 6: Final answer
    x = 105,331.03

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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.