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Finding the Fourth Proportional to 79,140.62, 109,209.75 and 43,323.72

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Solution

The fourth proportional to 79,140.62, 109,209.75 and 43,323.72 is: 59,784.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,140.62 : 109,209.75 = 43,323.72 : x
  2. Step 2: Convert to fraction form
    79,140.62/109,209.75 = 43,323.72/x
  3. Step 3: Cross multiply
    79,140.62x = 109,209.75 × 43,323.72
  4. Step 4: Simplify right side
    79,140.62x = 4,731,372,630.27
  5. Step 5: Solve for x
    x = 4,731,372,630.27/79,140.62
  6. Step 6: Final answer
    x = 59,784.38

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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.