Home / 131,138.40-196,659.60-42,415.20

Finding the Fourth Proportional to 131,138.40, 196,659.60 and 42,415.20

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Solution

The fourth proportional to 131,138.40, 196,659.60 and 42,415.20 is: 63,607.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,138.40 : 196,659.60 = 42,415.20 : x
  2. Step 2: Convert to fraction form
    131,138.40/196,659.60 = 42,415.20/x
  3. Step 3: Cross multiply
    131,138.40x = 196,659.60 × 42,415.20
  4. Step 4: Simplify right side
    131,138.40x = 8,341,356,265.92
  5. Step 5: Solve for x
    x = 8,341,356,265.92/131,138.40
  6. Step 6: Final answer
    x = 63,607.27

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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.