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Finding the Fourth Proportional to 99,285.70, 137,034.21 and 58,991.72

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Solution

The fourth proportional to 99,285.70, 137,034.21 and 58,991.72 is: 81,420.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,285.70 : 137,034.21 = 58,991.72 : x
  2. Step 2: Convert to fraction form
    99,285.70/137,034.21 = 58,991.72/x
  3. Step 3: Cross multiply
    99,285.70x = 137,034.21 × 58,991.72
  4. Step 4: Simplify right side
    99,285.70x = 8,083,883,170.46
  5. Step 5: Solve for x
    x = 8,083,883,170.46/99,285.70
  6. Step 6: Final answer
    x = 81,420.42

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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.