Home / 120,178.47-180,309.32-45,320.09

Finding the Fourth Proportional to 120,178.47, 180,309.32 and 45,320.09

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Solution

The fourth proportional to 120,178.47, 180,309.32 and 45,320.09 is: 67,995.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,178.47 : 180,309.32 = 45,320.09 : x
  2. Step 2: Convert to fraction form
    120,178.47/180,309.32 = 45,320.09/x
  3. Step 3: Cross multiply
    120,178.47x = 180,309.32 × 45,320.09
  4. Step 4: Simplify right side
    120,178.47x = 8,171,633,482.09
  5. Step 5: Solve for x
    x = 8,171,633,482.09/120,178.47
  6. Step 6: Final answer
    x = 67,995.82

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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.