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Finding the Fourth Proportional to 120,006.40, 180,009.60 and 36,900.40

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Solution

The fourth proportional to 120,006.40, 180,009.60 and 36,900.40 is: 55,350.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,006.40 : 180,009.60 = 36,900.40 : x
  2. Step 2: Convert to fraction form
    120,006.40/180,009.60 = 36,900.40/x
  3. Step 3: Cross multiply
    120,006.40x = 180,009.60 × 36,900.40
  4. Step 4: Simplify right side
    120,006.40x = 6,642,426,243.84
  5. Step 5: Solve for x
    x = 6,642,426,243.84/120,006.40
  6. Step 6: Final answer
    x = 55,350.60

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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.