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Finding the Fourth Proportional to 75,879.42, 104,718.15 and 42,347.58

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Solution

The fourth proportional to 75,879.42, 104,718.15 and 42,347.58 is: 58,442.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,879.42 : 104,718.15 = 42,347.58 : x
  2. Step 2: Convert to fraction form
    75,879.42/104,718.15 = 42,347.58/x
  3. Step 3: Cross multiply
    75,879.42x = 104,718.15 × 42,347.58
  4. Step 4: Simplify right side
    75,879.42x = 4,434,560,234.58
  5. Step 5: Solve for x
    x = 4,434,560,234.58/75,879.42
  6. Step 6: Final answer
    x = 58,442.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.