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Finding the Fourth Proportional to 79,287.86, 109,417.16 and 43,478.46

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Solution

The fourth proportional to 79,287.86, 109,417.16 and 43,478.46 is: 60,000.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,287.86 : 109,417.16 = 43,478.46 : x
  2. Step 2: Convert to fraction form
    79,287.86/109,417.16 = 43,478.46/x
  3. Step 3: Cross multiply
    79,287.86x = 109,417.16 × 43,478.46
  4. Step 4: Simplify right side
    79,287.86x = 4,757,289,723.07
  5. Step 5: Solve for x
    x = 4,757,289,723.07/79,287.86
  6. Step 6: Final answer
    x = 60,000.23

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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.