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Finding the Fourth Proportional to 68,835.77, 103,254.78 and 18,915.55

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Solution

The fourth proportional to 68,835.77, 103,254.78 and 18,915.55 is: 28,373.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,835.77 : 103,254.78 = 18,915.55 : x
  2. Step 2: Convert to fraction form
    68,835.77/103,254.78 = 18,915.55/x
  3. Step 3: Cross multiply
    68,835.77x = 103,254.78 × 18,915.55
  4. Step 4: Simplify right side
    68,835.77x = 1,953,120,695.69
  5. Step 5: Solve for x
    x = 1,953,120,695.69/68,835.77
  6. Step 6: Final answer
    x = 28,373.63

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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.