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Finding the Fourth Proportional to 159,509.99, 220,123.88 and 86,912.53

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Solution

The fourth proportional to 159,509.99, 220,123.88 and 86,912.53 is: 119,939.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,509.99 : 220,123.88 = 86,912.53 : x
  2. Step 2: Convert to fraction form
    159,509.99/220,123.88 = 86,912.53/x
  3. Step 3: Cross multiply
    159,509.99x = 220,123.88 × 86,912.53
  4. Step 4: Simplify right side
    159,509.99x = 19,131,522,665.27
  5. Step 5: Solve for x
    x = 19,131,522,665.27/159,509.99
  6. Step 6: Final answer
    x = 119,939.34

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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.