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Finding the Fourth Proportional to 120,088.85, 165,722.63 and 66,373.86

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Solution

The fourth proportional to 120,088.85, 165,722.63 and 66,373.86 is: 91,595.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,088.85 : 165,722.63 = 66,373.86 : x
  2. Step 2: Convert to fraction form
    120,088.85/165,722.63 = 66,373.86/x
  3. Step 3: Cross multiply
    120,088.85x = 165,722.63 × 66,373.86
  4. Step 4: Simplify right side
    120,088.85x = 10,999,650,310.58
  5. Step 5: Solve for x
    x = 10,999,650,310.58/120,088.85
  6. Step 6: Final answer
    x = 91,595.93

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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.