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Finding the Fourth Proportional to 316,785.53, 475,179.86 and 80,128.43

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Solution

The fourth proportional to 316,785.53, 475,179.86 and 80,128.43 is: 120,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,785.53 : 475,179.86 = 80,128.43 : x
  2. Step 2: Convert to fraction form
    316,785.53/475,179.86 = 80,128.43/x
  3. Step 3: Cross multiply
    316,785.53x = 475,179.86 × 80,128.43
  4. Step 4: Simplify right side
    316,785.53x = 38,075,417,537.69
  5. Step 5: Solve for x
    x = 38,075,417,537.69/316,785.53
  6. Step 6: Final answer
    x = 120,193.05

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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.