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Finding the Fourth Proportional to 152,179.20, 210,003.20 and 85,107.20

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Solution

The fourth proportional to 152,179.20, 210,003.20 and 85,107.20 is: 117,445.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,179.20 : 210,003.20 = 85,107.20 : x
  2. Step 2: Convert to fraction form
    152,179.20/210,003.20 = 85,107.20/x
  3. Step 3: Cross multiply
    152,179.20x = 210,003.20 × 85,107.20
  4. Step 4: Simplify right side
    152,179.20x = 17,872,784,343.04
  5. Step 5: Solve for x
    x = 17,872,784,343.04/152,179.20
  6. Step 6: Final answer
    x = 117,445.65

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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.