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Finding the Fourth Proportional to 120,000.80, 165,598.08 and 66,281.60

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Solution

The fourth proportional to 120,000.80, 165,598.08 and 66,281.60 is: 91,466.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,000.80 : 165,598.08 = 66,281.60 : x
  2. Step 2: Convert to fraction form
    120,000.80/165,598.08 = 66,281.60/x
  3. Step 3: Cross multiply
    120,000.80x = 165,598.08 × 66,281.60
  4. Step 4: Simplify right side
    120,000.80x = 10,976,105,699.33
  5. Step 5: Solve for x
    x = 10,976,105,699.33/120,000.80
  6. Step 6: Final answer
    x = 91,466.94

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1.5x scale

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.