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Finding the Fourth Proportional to 101,463.81, 140,059.31 and 90,834.99

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Solution

The fourth proportional to 101,463.81, 140,059.31 and 90,834.99 is: 125,387.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,463.81 : 140,059.31 = 90,834.99 : x
  2. Step 2: Convert to fraction form
    101,463.81/140,059.31 = 90,834.99/x
  3. Step 3: Cross multiply
    101,463.81x = 140,059.31 × 90,834.99
  4. Step 4: Simplify right side
    101,463.81x = 12,722,285,569.08
  5. Step 5: Solve for x
    x = 12,722,285,569.08/101,463.81
  6. Step 6: Final answer
    x = 125,387.42

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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.