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Finding the Fourth Proportional to 72,490.63, 100,037.25 and 42,296.71

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Solution

The fourth proportional to 72,490.63, 100,037.25 and 42,296.71 is: 58,369.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490.63 : 100,037.25 = 42,296.71 : x
  2. Step 2: Convert to fraction form
    72,490.63/100,037.25 = 42,296.71/x
  3. Step 3: Cross multiply
    72,490.63x = 100,037.25 × 42,296.71
  4. Step 4: Simplify right side
    72,490.63x = 4,231,246,552.45
  5. Step 5: Solve for x
    x = 4,231,246,552.45/72,490.63
  6. Step 6: Final answer
    x = 58,369.57

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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.