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Finding the Fourth Proportional to 120,003.80, 180,005.70 and 99,008.60

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Solution

The fourth proportional to 120,003.80, 180,005.70 and 99,008.60 is: 148,512.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,003.80 : 180,005.70 = 99,008.60 : x
  2. Step 2: Convert to fraction form
    120,003.80/180,005.70 = 99,008.60/x
  3. Step 3: Cross multiply
    120,003.80x = 180,005.70 × 99,008.60
  4. Step 4: Simplify right side
    120,003.80x = 17,822,112,349.02
  5. Step 5: Solve for x
    x = 17,822,112,349.02/120,003.80
  6. Step 6: Final answer
    x = 148,512.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.