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Finding the Fourth Proportional to 117,728.16, 162,511.92 and 72,424.50

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Solution

The fourth proportional to 117,728.16, 162,511.92 and 72,424.50 is: 99,974.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,728.16 : 162,511.92 = 72,424.50 : x
  2. Step 2: Convert to fraction form
    117,728.16/162,511.92 = 72,424.50/x
  3. Step 3: Cross multiply
    117,728.16x = 162,511.92 × 72,424.50
  4. Step 4: Simplify right side
    117,728.16x = 11,769,844,550.04
  5. Step 5: Solve for x
    x = 11,769,844,550.04/117,728.16
  6. Step 6: Final answer
    x = 99,974.76

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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.