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Finding the Fourth Proportional to 138,889.36, 208,359.96 and 45,460.72

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Solution

The fourth proportional to 138,889.36, 208,359.96 and 45,460.72 is: 68,199.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.36 : 208,359.96 = 45,460.72 : x
  2. Step 2: Convert to fraction form
    138,889.36/208,359.96 = 45,460.72/x
  3. Step 3: Cross multiply
    138,889.36x = 208,359.96 × 45,460.72
  4. Step 4: Simplify right side
    138,889.36x = 9,472,193,800.77
  5. Step 5: Solve for x
    x = 9,472,193,800.77/138,889.36
  6. Step 6: Final answer
    x = 68,199.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.