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Finding the Fourth Proportional to 79,554.78, 109,683.68 and 65,161.60

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Solution

The fourth proportional to 79,554.78, 109,683.68 and 65,161.60 is: 89,839.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,554.78 : 109,683.68 = 65,161.60 : x
  2. Step 2: Convert to fraction form
    79,554.78/109,683.68 = 65,161.60/x
  3. Step 3: Cross multiply
    79,554.78x = 109,683.68 × 65,161.60
  4. Step 4: Simplify right side
    79,554.78x = 7,147,163,482.67
  5. Step 5: Solve for x
    x = 7,147,163,482.67/79,554.78
  6. Step 6: Final answer
    x = 89,839.52

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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.