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Finding the Fourth Proportional to 138,586.55, 191,248.59 and 74,924.19

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Solution

The fourth proportional to 138,586.55, 191,248.59 and 74,924.19 is: 103,394.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,586.55 : 191,248.59 = 74,924.19 : x
  2. Step 2: Convert to fraction form
    138,586.55/191,248.59 = 74,924.19/x
  3. Step 3: Cross multiply
    138,586.55x = 191,248.59 × 74,924.19
  4. Step 4: Simplify right side
    138,586.55x = 14,329,145,975.36
  5. Step 5: Solve for x
    x = 14,329,145,975.36/138,586.55
  6. Step 6: Final answer
    x = 103,394.93

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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.