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Finding the Fourth Proportional to 138,988.58, 191,804.40 and 75,326.54

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Solution

The fourth proportional to 138,988.58, 191,804.40 and 75,326.54 is: 103,950.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,988.58 : 191,804.40 = 75,326.54 : x
  2. Step 2: Convert to fraction form
    138,988.58/191,804.40 = 75,326.54/x
  3. Step 3: Cross multiply
    138,988.58x = 191,804.40 × 75,326.54
  4. Step 4: Simplify right side
    138,988.58x = 14,447,961,808.78
  5. Step 5: Solve for x
    x = 14,447,961,808.78/138,988.58
  6. Step 6: Final answer
    x = 103,950.71

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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.