Home / 78,421.62-108,221.61-42,611.75

Finding the Fourth Proportional to 78,421.62, 108,221.61 and 42,611.75

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Solution

The fourth proportional to 78,421.62, 108,221.61 and 42,611.75 is: 58,804.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,421.62 : 108,221.61 = 42,611.75 : x
  2. Step 2: Convert to fraction form
    78,421.62/108,221.61 = 42,611.75/x
  3. Step 3: Cross multiply
    78,421.62x = 108,221.61 × 42,611.75
  4. Step 4: Simplify right side
    78,421.62x = 4,611,512,189.92
  5. Step 5: Solve for x
    x = 4,611,512,189.92/78,421.62
  6. Step 6: Final answer
    x = 58,804.09

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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.