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Finding the Fourth Proportional to 291,820.71, 437,735.45 and 81,459.75

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Solution

The fourth proportional to 291,820.71, 437,735.45 and 81,459.75 is: 122,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,820.71 : 437,735.45 = 81,459.75 : x
  2. Step 2: Convert to fraction form
    291,820.71/437,735.45 = 81,459.75/x
  3. Step 3: Cross multiply
    291,820.71x = 437,735.45 × 81,459.75
  4. Step 4: Simplify right side
    291,820.71x = 35,657,819,915.84
  5. Step 5: Solve for x
    x = 35,657,819,915.84/291,820.71
  6. Step 6: Final answer
    x = 122,190.85

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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.