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Finding the Fourth Proportional to 291,785.70, 437,615.37 and 78,548.34

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Solution

The fourth proportional to 291,785.70, 437,615.37 and 78,548.34 is: 117,805.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,785.70 : 437,615.37 = 78,548.34 : x
  2. Step 2: Convert to fraction form
    291,785.70/437,615.37 = 78,548.34/x
  3. Step 3: Cross multiply
    291,785.70x = 437,615.37 × 78,548.34
  4. Step 4: Simplify right side
    291,785.70x = 34,373,960,871.99
  5. Step 5: Solve for x
    x = 34,373,960,871.99/291,785.70
  6. Step 6: Final answer
    x = 117,805.50

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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.