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Finding the Fourth Proportional to 138,497.72, 191,126.96 and 74,835.52

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Solution

The fourth proportional to 138,497.72, 191,126.96 and 74,835.52 is: 103,273.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,497.72 : 191,126.96 = 74,835.52 : x
  2. Step 2: Convert to fraction form
    138,497.72/191,126.96 = 74,835.52/x
  3. Step 3: Cross multiply
    138,497.72x = 191,126.96 × 74,835.52
  4. Step 4: Simplify right side
    138,497.72x = 14,303,085,437.62
  5. Step 5: Solve for x
    x = 14,303,085,437.62/138,497.72
  6. Step 6: Final answer
    x = 103,273.08

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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.