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Finding the Fourth Proportional to 159,158.76, 219,640.20 and 86,561.64

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Solution

The fourth proportional to 159,158.76, 219,640.20 and 86,561.64 is: 119,455.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,158.76 : 219,640.20 = 86,561.64 : x
  2. Step 2: Convert to fraction form
    159,158.76/219,640.20 = 86,561.64/x
  3. Step 3: Cross multiply
    159,158.76x = 219,640.20 × 86,561.64
  4. Step 4: Simplify right side
    159,158.76x = 19,012,415,921.93
  5. Step 5: Solve for x
    x = 19,012,415,921.93/159,158.76
  6. Step 6: Final answer
    x = 119,455.67

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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.