Home / 291,627.20-437,386.80-81,221.60

Finding the Fourth Proportional to 291,627.20, 437,386.80 and 81,221.60

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Solution

The fourth proportional to 291,627.20, 437,386.80 and 81,221.60 is: 121,817.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,627.20 : 437,386.80 = 81,221.60 : x
  2. Step 2: Convert to fraction form
    291,627.20/437,386.80 = 81,221.60/x
  3. Step 3: Cross multiply
    291,627.20x = 437,386.80 × 81,221.60
  4. Step 4: Simplify right side
    291,627.20x = 35,525,255,714.88
  5. Step 5: Solve for x
    x = 35,525,255,714.88/291,627.20
  6. Step 6: Final answer
    x = 121,817.36

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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.