Home / 120,812.21-166,715.45-72,440.83

Finding the Fourth Proportional to 120,812.21, 166,715.45 and 72,440.83

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Solution

The fourth proportional to 120,812.21, 166,715.45 and 72,440.83 is: 99,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,812.21 : 166,715.45 = 72,440.83 : x
  2. Step 2: Convert to fraction form
    120,812.21/166,715.45 = 72,440.83/x
  3. Step 3: Cross multiply
    120,812.21x = 166,715.45 × 72,440.83
  4. Step 4: Simplify right side
    120,812.21x = 12,077,005,689.67
  5. Step 5: Solve for x
    x = 12,077,005,689.67/120,812.21
  6. Step 6: Final answer
    x = 99,965.11

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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.