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Finding the Fourth Proportional to 159,346.60, 219,889.96 and 87,712.63

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Solution

The fourth proportional to 159,346.60, 219,889.96 and 87,712.63 is: 121,038.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,346.60 : 219,889.96 = 87,712.63 : x
  2. Step 2: Convert to fraction form
    159,346.60/219,889.96 = 87,712.63/x
  3. Step 3: Cross multiply
    159,346.60x = 219,889.96 × 87,712.63
  4. Step 4: Simplify right side
    159,346.60x = 19,287,125,933.19
  5. Step 5: Solve for x
    x = 19,287,125,933.19/159,346.60
  6. Step 6: Final answer
    x = 121,038.83

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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.