Home / 291,721.20-437,527.80-81,315.60

Finding the Fourth Proportional to 291,721.20, 437,527.80 and 81,315.60

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Solution

The fourth proportional to 291,721.20, 437,527.80 and 81,315.60 is: 121,958.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,721.20 : 437,527.80 = 81,315.60 : x
  2. Step 2: Convert to fraction form
    291,721.20/437,527.80 = 81,315.60/x
  3. Step 3: Cross multiply
    291,721.20x = 437,527.80 × 81,315.60
  4. Step 4: Simplify right side
    291,721.20x = 35,577,835,573.68
  5. Step 5: Solve for x
    x = 35,577,835,573.68/291,721.20
  6. Step 6: Final answer
    x = 121,958.35

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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.