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Finding the Fourth Proportional to 138,597.45, 191,264.76 and 74,935.25

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Solution

The fourth proportional to 138,597.45, 191,264.76 and 74,935.25 is: 103,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,597.45 : 191,264.76 = 74,935.25 : x
  2. Step 2: Convert to fraction form
    138,597.45/191,264.76 = 74,935.25/x
  3. Step 3: Cross multiply
    138,597.45x = 191,264.76 × 74,935.25
  4. Step 4: Simplify right side
    138,597.45x = 14,332,472,606.79
  5. Step 5: Solve for x
    x = 14,332,472,606.79/138,597.45
  6. Step 6: Final answer
    x = 103,410.80

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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.