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Finding the Fourth Proportional to 79,449.19, 109,649.60 and 45,915.19

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Solution

The fourth proportional to 79,449.19, 109,649.60 and 45,915.19 is: 63,368.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,449.19 : 109,649.60 = 45,915.19 : x
  2. Step 2: Convert to fraction form
    79,449.19/109,649.60 = 45,915.19/x
  3. Step 3: Cross multiply
    79,449.19x = 109,649.60 × 45,915.19
  4. Step 4: Simplify right side
    79,449.19x = 5,034,581,885.91
  5. Step 5: Solve for x
    x = 5,034,581,885.91/79,449.19
  6. Step 6: Final answer
    x = 63,368.58

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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.