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Finding the Fourth Proportional to 189,460.80, 283,919.76 and 139,145.76

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Solution

The fourth proportional to 189,460.80, 283,919.76 and 139,145.76 is: 208,519.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,460.80 : 283,919.76 = 139,145.76 : x
  2. Step 2: Convert to fraction form
    189,460.80/283,919.76 = 139,145.76/x
  3. Step 3: Cross multiply
    189,460.80x = 283,919.76 × 139,145.76
  4. Step 4: Simplify right side
    189,460.80x = 39,506,230,784.22
  5. Step 5: Solve for x
    x = 39,506,230,784.22/189,460.80
  6. Step 6: Final answer
    x = 208,519.29

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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.