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Finding the Fourth Proportional to 79,421.55, 109,601.76 and 43,611.57

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Solution

The fourth proportional to 79,421.55, 109,601.76 and 43,611.57 is: 60,183.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,421.55 : 109,601.76 = 43,611.57 : x
  2. Step 2: Convert to fraction form
    79,421.55/109,601.76 = 43,611.57/x
  3. Step 3: Cross multiply
    79,421.55x = 109,601.76 × 43,611.57
  4. Step 4: Simplify right side
    79,421.55x = 4,779,904,828.36
  5. Step 5: Solve for x
    x = 4,779,904,828.36/79,421.55
  6. Step 6: Final answer
    x = 60,183.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.