Home / 101,438.45-139,983.85-56,112.87

Finding the Fourth Proportional to 101,438.45, 139,983.85 and 56,112.87

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Solution

The fourth proportional to 101,438.45, 139,983.85 and 56,112.87 is: 77,435.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,438.45 : 139,983.85 = 56,112.87 : x
  2. Step 2: Convert to fraction form
    101,438.45/139,983.85 = 56,112.87/x
  3. Step 3: Cross multiply
    101,438.45x = 139,983.85 × 56,112.87
  4. Step 4: Simplify right side
    101,438.45x = 7,854,895,577.15
  5. Step 5: Solve for x
    x = 7,854,895,577.15/101,438.45
  6. Step 6: Final answer
    x = 77,435.09

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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.