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Finding the Fourth Proportional to 131,358.50, 181,274.94 and 74,769.88

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Solution

The fourth proportional to 131,358.50, 181,274.94 and 74,769.88 is: 103,182.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,358.50 : 181,274.94 = 74,769.88 : x
  2. Step 2: Convert to fraction form
    131,358.50/181,274.94 = 74,769.88/x
  3. Step 3: Cross multiply
    131,358.50x = 181,274.94 × 74,769.88
  4. Step 4: Simplify right side
    131,358.50x = 13,553,905,510.81
  5. Step 5: Solve for x
    x = 13,553,905,510.81/131,358.50
  6. Step 6: Final answer
    x = 103,182.55

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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.