Home / 291,962.40-437,911.20-81,621.60

Finding the Fourth Proportional to 291,962.40, 437,911.20 and 81,621.60

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Solution

The fourth proportional to 291,962.40, 437,911.20 and 81,621.60 is: 122,423.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,962.40 : 437,911.20 = 81,621.60 : x
  2. Step 2: Convert to fraction form
    291,962.40/437,911.20 = 81,621.60/x
  3. Step 3: Cross multiply
    291,962.40x = 437,911.20 × 81,621.60
  4. Step 4: Simplify right side
    291,962.40x = 35,743,012,801.92
  5. Step 5: Solve for x
    x = 35,743,012,801.92/291,962.40
  6. Step 6: Final answer
    x = 122,423.34

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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.