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Finding the Fourth Proportional to 120,007.40, 180,011.10 and 74,906.60

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Solution

The fourth proportional to 120,007.40, 180,011.10 and 74,906.60 is: 112,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,007.40 : 180,011.10 = 74,906.60 : x
  2. Step 2: Convert to fraction form
    120,007.40/180,011.10 = 74,906.60/x
  3. Step 3: Cross multiply
    120,007.40x = 180,011.10 × 74,906.60
  4. Step 4: Simplify right side
    120,007.40x = 13,484,019,463.26
  5. Step 5: Solve for x
    x = 13,484,019,463.26/120,007.40
  6. Step 6: Final answer
    x = 112,359.90

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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.