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Finding the Fourth Proportional to 291,707.75, 437,635.43 and 81,345.71

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Solution

The fourth proportional to 291,707.75, 437,635.43 and 81,345.71 is: 122,039.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,707.75 : 437,635.43 = 81,345.71 : x
  2. Step 2: Convert to fraction form
    291,707.75/437,635.43 = 81,345.71/x
  3. Step 3: Cross multiply
    291,707.75x = 437,635.43 × 81,345.71
  4. Step 4: Simplify right side
    291,707.75x = 35,599,764,774.51
  5. Step 5: Solve for x
    x = 35,599,764,774.51/291,707.75
  6. Step 6: Final answer
    x = 122,039.15

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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.