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Finding the Fourth Proportional to 120,009.40, 180,014.10 and 74,908.60

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Solution

The fourth proportional to 120,009.40, 180,014.10 and 74,908.60 is: 112,362.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,009.40 : 180,014.10 = 74,908.60 : x
  2. Step 2: Convert to fraction form
    120,009.40/180,014.10 = 74,908.60/x
  3. Step 3: Cross multiply
    120,009.40x = 180,014.10 × 74,908.60
  4. Step 4: Simplify right side
    120,009.40x = 13,484,604,211.26
  5. Step 5: Solve for x
    x = 13,484,604,211.26/120,009.40
  6. Step 6: Final answer
    x = 112,362.90

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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.