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Finding the Fourth Proportional to 217,158.32, 299,690.73 and 121,695.77

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Solution

The fourth proportional to 217,158.32, 299,690.73 and 121,695.77 is: 167,947.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,158.32 : 299,690.73 = 121,695.77 : x
  2. Step 2: Convert to fraction form
    217,158.32/299,690.73 = 121,695.77/x
  3. Step 3: Cross multiply
    217,158.32x = 299,690.73 × 121,695.77
  4. Step 4: Simplify right side
    217,158.32x = 36,471,092,650.76
  5. Step 5: Solve for x
    x = 36,471,092,650.76/217,158.32
  6. Step 6: Final answer
    x = 167,947.02

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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.