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Finding the Fourth Proportional to 139,418.19, 192,398.32 and 75,755.98

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Solution

The fourth proportional to 139,418.19, 192,398.32 and 75,755.98 is: 104,543.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.19 : 192,398.32 = 75,755.98 : x
  2. Step 2: Convert to fraction form
    139,418.19/192,398.32 = 75,755.98/x
  3. Step 3: Cross multiply
    139,418.19x = 192,398.32 × 75,755.98
  4. Step 4: Simplify right side
    139,418.19x = 14,575,323,732.14
  5. Step 5: Solve for x
    x = 14,575,323,732.14/139,418.19
  6. Step 6: Final answer
    x = 104,543.92

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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.