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Finding the Fourth Proportional to 228,247.13, 342,303.75 and 85,989.75

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Solution

The fourth proportional to 228,247.13, 342,303.75 and 85,989.75 is: 128,959.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,247.13 : 342,303.75 = 85,989.75 : x
  2. Step 2: Convert to fraction form
    228,247.13/342,303.75 = 85,989.75/x
  3. Step 3: Cross multiply
    228,247.13x = 342,303.75 × 85,989.75
  4. Step 4: Simplify right side
    228,247.13x = 29,434,613,886.56
  5. Step 5: Solve for x
    x = 29,434,613,886.56/228,247.13
  6. Step 6: Final answer
    x = 128,959.41

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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.