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Finding the Fourth Proportional to 141,878.48, 212,442.22 and 85,643.42

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Solution

The fourth proportional to 141,878.48, 212,442.22 and 85,643.42 is: 128,238.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,878.48 : 212,442.22 = 85,643.42 : x
  2. Step 2: Convert to fraction form
    141,878.48/212,442.22 = 85,643.42/x
  3. Step 3: Cross multiply
    141,878.48x = 212,442.22 × 85,643.42
  4. Step 4: Simplify right side
    141,878.48x = 18,194,278,273.19
  5. Step 5: Solve for x
    x = 18,194,278,273.19/141,878.48
  6. Step 6: Final answer
    x = 128,238.46

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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.