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Finding the Fourth Proportional to 74,915.94, 112,378.22 and 28,169.22

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Solution

The fourth proportional to 74,915.94, 112,378.22 and 28,169.22 is: 42,255.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,915.94 : 112,378.22 = 28,169.22 : x
  2. Step 2: Convert to fraction form
    74,915.94/112,378.22 = 28,169.22/x
  3. Step 3: Cross multiply
    74,915.94x = 112,378.22 × 28,169.22
  4. Step 4: Simplify right side
    74,915.94x = 3,165,606,240.50
  5. Step 5: Solve for x
    x = 3,165,606,240.50/74,915.94
  6. Step 6: Final answer
    x = 42,255.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.