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Finding the Fourth Proportional to 159,615.72, 220,265.64 and 87,994.08

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Solution

The fourth proportional to 159,615.72, 220,265.64 and 87,994.08 is: 121,429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,615.72 : 220,265.64 = 87,994.08 : x
  2. Step 2: Convert to fraction form
    159,615.72/220,265.64 = 87,994.08/x
  3. Step 3: Cross multiply
    159,615.72x = 220,265.64 × 87,994.08
  4. Step 4: Simplify right side
    159,615.72x = 19,382,072,347.41
  5. Step 5: Solve for x
    x = 19,382,072,347.41/159,615.72
  6. Step 6: Final answer
    x = 121,429.60

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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.