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Finding the Fourth Proportional to 138,574.98, 191,233.50 and 74,912.76

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Solution

The fourth proportional to 138,574.98, 191,233.50 and 74,912.76 is: 103,379.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,574.98 : 191,233.50 = 74,912.76 : x
  2. Step 2: Convert to fraction form
    138,574.98/191,233.50 = 74,912.76/x
  3. Step 3: Cross multiply
    138,574.98x = 191,233.50 × 74,912.76
  4. Step 4: Simplify right side
    138,574.98x = 14,325,829,289.46
  5. Step 5: Solve for x
    x = 14,325,829,289.46/138,574.98
  6. Step 6: Final answer
    x = 103,379.62

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1.5x scale

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.