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Finding the Fourth Proportional to 117,362.74, 161,898.60 and 72,049.72

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Solution

The fourth proportional to 117,362.74, 161,898.60 and 72,049.72 is: 99,390.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,362.74 : 161,898.60 = 72,049.72 : x
  2. Step 2: Convert to fraction form
    117,362.74/161,898.60 = 72,049.72/x
  3. Step 3: Cross multiply
    117,362.74x = 161,898.60 × 72,049.72
  4. Step 4: Simplify right side
    117,362.74x = 11,664,748,798.39
  5. Step 5: Solve for x
    x = 11,664,748,798.39/117,362.74
  6. Step 6: Final answer
    x = 99,390.56

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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.