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Finding the Fourth Proportional to 291,672.78, 437,509.20 and 70,056.78

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Solution

The fourth proportional to 291,672.78, 437,509.20 and 70,056.78 is: 105,085.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,672.78 : 437,509.20 = 70,056.78 : x
  2. Step 2: Convert to fraction form
    291,672.78/437,509.20 = 70,056.78/x
  3. Step 3: Cross multiply
    291,672.78x = 437,509.20 × 70,056.78
  4. Step 4: Simplify right side
    291,672.78x = 30,650,485,772.38
  5. Step 5: Solve for x
    x = 30,650,485,772.38/291,672.78
  6. Step 6: Final answer
    x = 105,085.18

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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.