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Finding the Fourth Proportional to 142,480.55, 213,509.34 and 79,213.64

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Solution

The fourth proportional to 142,480.55, 213,509.34 and 79,213.64 is: 118,702.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,480.55 : 213,509.34 = 79,213.64 : x
  2. Step 2: Convert to fraction form
    142,480.55/213,509.34 = 79,213.64/x
  3. Step 3: Cross multiply
    142,480.55x = 213,509.34 × 79,213.64
  4. Step 4: Simplify right side
    142,480.55x = 16,912,850,927.85
  5. Step 5: Solve for x
    x = 16,912,850,927.85/142,480.55
  6. Step 6: Final answer
    x = 118,702.87

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1.5x scale

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.