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Finding the Fourth Proportional to 159,521.55, 220,149.53 and 87,901.55

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Solution

The fourth proportional to 159,521.55, 220,149.53 and 87,901.55 is: 121,309.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,521.55 : 220,149.53 = 87,901.55 : x
  2. Step 2: Convert to fraction form
    159,521.55/220,149.53 = 87,901.55/x
  3. Step 3: Cross multiply
    159,521.55x = 220,149.53 × 87,901.55
  4. Step 4: Simplify right side
    159,521.55x = 19,351,484,918.77
  5. Step 5: Solve for x
    x = 19,351,484,918.77/159,521.55
  6. Step 6: Final answer
    x = 121,309.53

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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.