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Finding the Fourth Proportional to 120,718.09, 166,583.20 and 75,393.40

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Solution

The fourth proportional to 120,718.09, 166,583.20 and 75,393.40 is: 104,038.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,718.09 : 166,583.20 = 75,393.40 : x
  2. Step 2: Convert to fraction form
    120,718.09/166,583.20 = 75,393.40/x
  3. Step 3: Cross multiply
    120,718.09x = 166,583.20 × 75,393.40
  4. Step 4: Simplify right side
    120,718.09x = 12,559,273,830.88
  5. Step 5: Solve for x
    x = 12,559,273,830.88/120,718.09
  6. Step 6: Final answer
    x = 104,038.04

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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.