Home / 100,983.86-139,351.82-57,953.42

Finding the Fourth Proportional to 100,983.86, 139,351.82 and 57,953.42

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Solution

The fourth proportional to 100,983.86, 139,351.82 and 57,953.42 is: 79,972.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,983.86 : 139,351.82 = 57,953.42 : x
  2. Step 2: Convert to fraction form
    100,983.86/139,351.82 = 57,953.42/x
  3. Step 3: Cross multiply
    100,983.86x = 139,351.82 × 57,953.42
  4. Step 4: Simplify right side
    100,983.86x = 8,075,913,565.70
  5. Step 5: Solve for x
    x = 8,075,913,565.70/100,983.86
  6. Step 6: Final answer
    x = 79,972.32

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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.