Home / 120,385.43-166,134.21-72,037.07

Finding the Fourth Proportional to 120,385.43, 166,134.21 and 72,037.07

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Solution

The fourth proportional to 120,385.43, 166,134.21 and 72,037.07 is: 99,412.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,385.43 : 166,134.21 = 72,037.07 : x
  2. Step 2: Convert to fraction form
    120,385.43/166,134.21 = 72,037.07/x
  3. Step 3: Cross multiply
    120,385.43x = 166,134.21 × 72,037.07
  4. Step 4: Simplify right side
    120,385.43x = 11,967,821,715.16
  5. Step 5: Solve for x
    x = 11,967,821,715.16/120,385.43
  6. Step 6: Final answer
    x = 99,412.54

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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.