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Finding the Fourth Proportional to 79,792.84, 109,315.73 and 76,801.51

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Solution

The fourth proportional to 79,792.84, 109,315.73 and 76,801.51 is: 105,217.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,792.84 : 109,315.73 = 76,801.51 : x
  2. Step 2: Convert to fraction form
    79,792.84/109,315.73 = 76,801.51/x
  3. Step 3: Cross multiply
    79,792.84x = 109,315.73 × 76,801.51
  4. Step 4: Simplify right side
    79,792.84x = 8,395,613,130.75
  5. Step 5: Solve for x
    x = 8,395,613,130.75/79,792.84
  6. Step 6: Final answer
    x = 105,217.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.