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Finding the Fourth Proportional to 139,079.68, 191,926.56 and 75,415.84

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Solution

The fourth proportional to 139,079.68, 191,926.56 and 75,415.84 is: 104,072.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,079.68 : 191,926.56 = 75,415.84 : x
  2. Step 2: Convert to fraction form
    139,079.68/191,926.56 = 75,415.84/x
  3. Step 3: Cross multiply
    139,079.68x = 191,926.56 × 75,415.84
  4. Step 4: Simplify right side
    139,079.68x = 14,474,302,740.71
  5. Step 5: Solve for x
    x = 14,474,302,740.71/139,079.68
  6. Step 6: Final answer
    x = 104,072.02

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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.