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Finding the Fourth Proportional to 117,663.39, 162,400.55 and 72,379.53

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Solution

The fourth proportional to 117,663.39, 162,400.55 and 72,379.53 is: 99,899.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,663.39 : 162,400.55 = 72,379.53 : x
  2. Step 2: Convert to fraction form
    117,663.39/162,400.55 = 72,379.53/x
  3. Step 3: Cross multiply
    117,663.39x = 162,400.55 × 72,379.53
  4. Step 4: Simplify right side
    117,663.39x = 11,754,475,118.84
  5. Step 5: Solve for x
    x = 11,754,475,118.84/117,663.39
  6. Step 6: Final answer
    x = 99,899.17

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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.