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Finding the Fourth Proportional to 72,490.64, 100,037.26 and 42,296.72

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Solution

The fourth proportional to 72,490.64, 100,037.26 and 42,296.72 is: 58,369.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490.64 : 100,037.26 = 42,296.72 : x
  2. Step 2: Convert to fraction form
    72,490.64/100,037.26 = 42,296.72/x
  3. Step 3: Cross multiply
    72,490.64x = 100,037.26 × 42,296.72
  4. Step 4: Simplify right side
    72,490.64x = 4,231,247,975.79
  5. Step 5: Solve for x
    x = 4,231,247,975.79/72,490.64
  6. Step 6: Final answer
    x = 58,369.58

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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.