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Finding the Fourth Proportional to 159,303.62, 219,844.85 and 87,686.66

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Solution

The fourth proportional to 159,303.62, 219,844.85 and 87,686.66 is: 121,010.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,303.62 : 219,844.85 = 87,686.66 : x
  2. Step 2: Convert to fraction form
    159,303.62/219,844.85 = 87,686.66/x
  3. Step 3: Cross multiply
    159,303.62x = 219,844.85 × 87,686.66
  4. Step 4: Simplify right side
    159,303.62x = 19,277,459,077.04
  5. Step 5: Solve for x
    x = 19,277,459,077.04/159,303.62
  6. Step 6: Final answer
    x = 121,010.81

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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.