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Finding the Fourth Proportional to 76,173.92, 105,110.16 and 42,639.92

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Solution

The fourth proportional to 76,173.92, 105,110.16 and 42,639.92 is: 58,837.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,173.92 : 105,110.16 = 42,639.92 : x
  2. Step 2: Convert to fraction form
    76,173.92/105,110.16 = 42,639.92/x
  3. Step 3: Cross multiply
    76,173.92x = 105,110.16 × 42,639.92
  4. Step 4: Simplify right side
    76,173.92x = 4,481,888,813.59
  5. Step 5: Solve for x
    x = 4,481,888,813.59/76,173.92
  6. Step 6: Final answer
    x = 58,837.58

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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.