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Finding the Fourth Proportional to 207,159.45, 310,903.20 and 80,860.20

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Solution

The fourth proportional to 207,159.45, 310,903.20 and 80,860.20 is: 121,354.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,159.45 : 310,903.20 = 80,860.20 : x
  2. Step 2: Convert to fraction form
    207,159.45/310,903.20 = 80,860.20/x
  3. Step 3: Cross multiply
    207,159.45x = 310,903.20 × 80,860.20
  4. Step 4: Simplify right side
    207,159.45x = 25,139,694,932.64
  5. Step 5: Solve for x
    x = 25,139,694,932.64/207,159.45
  6. Step 6: Final answer
    x = 121,354.32

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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.