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Finding the Fourth Proportional to 100,762.72, 139,037.88 and 60,467.92

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Solution

The fourth proportional to 100,762.72, 139,037.88 and 60,467.92 is: 83,436.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,762.72 : 139,037.88 = 60,467.92 : x
  2. Step 2: Convert to fraction form
    100,762.72/139,037.88 = 60,467.92/x
  3. Step 3: Cross multiply
    100,762.72x = 139,037.88 × 60,467.92
  4. Step 4: Simplify right side
    100,762.72x = 8,407,331,404.81
  5. Step 5: Solve for x
    x = 8,407,331,404.81/100,762.72
  6. Step 6: Final answer
    x = 83,436.92

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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.