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Finding the Fourth Proportional to 79,215.84, 109,327.32 and 49,021.20

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Solution

The fourth proportional to 79,215.84, 109,327.32 and 49,021.20 is: 67,655.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,215.84 : 109,327.32 = 49,021.20 : x
  2. Step 2: Convert to fraction form
    79,215.84/109,327.32 = 49,021.20/x
  3. Step 3: Cross multiply
    79,215.84x = 109,327.32 × 49,021.20
  4. Step 4: Simplify right side
    79,215.84x = 5,359,356,419.18
  5. Step 5: Solve for x
    x = 5,359,356,419.18/79,215.84
  6. Step 6: Final answer
    x = 67,655.11

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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.