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Finding the Fourth Proportional to 119,575.80, 165,015.72 and 65,861.01

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Solution

The fourth proportional to 119,575.80, 165,015.72 and 65,861.01 is: 90,888.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,575.80 : 165,015.72 = 65,861.01 : x
  2. Step 2: Convert to fraction form
    119,575.80/165,015.72 = 65,861.01/x
  3. Step 3: Cross multiply
    119,575.80x = 165,015.72 × 65,861.01
  4. Step 4: Simplify right side
    119,575.80x = 10,868,101,985.08
  5. Step 5: Solve for x
    x = 10,868,101,985.08/119,575.80
  6. Step 6: Final answer
    x = 90,888.81

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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.