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Finding the Fourth Proportional to 99,775.05, 137,671.43 and 58,945.82

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Solution

The fourth proportional to 99,775.05, 137,671.43 and 58,945.82 is: 81,334.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,775.05 : 137,671.43 = 58,945.82 : x
  2. Step 2: Convert to fraction form
    99,775.05/137,671.43 = 58,945.82/x
  3. Step 3: Cross multiply
    99,775.05x = 137,671.43 × 58,945.82
  4. Step 4: Simplify right side
    99,775.05x = 8,115,155,331.92
  5. Step 5: Solve for x
    x = 8,115,155,331.92/99,775.05
  6. Step 6: Final answer
    x = 81,334.52

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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.