Home / 156,972.80-235,459.20-78,240.80

Finding the Fourth Proportional to 156,972.80, 235,459.20 and 78,240.80

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Solution

The fourth proportional to 156,972.80, 235,459.20 and 78,240.80 is: 117,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,972.80 : 235,459.20 = 78,240.80 : x
  2. Step 2: Convert to fraction form
    156,972.80/235,459.20 = 78,240.80/x
  3. Step 3: Cross multiply
    156,972.80x = 235,459.20 × 78,240.80
  4. Step 4: Simplify right side
    156,972.80x = 18,422,516,175.36
  5. Step 5: Solve for x
    x = 18,422,516,175.36/156,972.80
  6. Step 6: Final answer
    x = 117,361.20

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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.