Home / 125,408.40-188,190.64-78,116.36

Finding the Fourth Proportional to 125,408.40, 188,190.64 and 78,116.36

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Solution

The fourth proportional to 125,408.40, 188,190.64 and 78,116.36 is: 117,223.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,408.40 : 188,190.64 = 78,116.36 : x
  2. Step 2: Convert to fraction form
    125,408.40/188,190.64 = 78,116.36/x
  3. Step 3: Cross multiply
    125,408.40x = 188,190.64 × 78,116.36
  4. Step 4: Simplify right side
    125,408.40x = 14,700,767,782.87
  5. Step 5: Solve for x
    x = 14,700,767,782.87/125,408.40
  6. Step 6: Final answer
    x = 117,223.15

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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.