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Finding the Fourth Proportional to 79,137.84, 109,213.20 and 45,151.92

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Solution

The fourth proportional to 79,137.84, 109,213.20 and 45,151.92 is: 62,311.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,137.84 : 109,213.20 = 45,151.92 : x
  2. Step 2: Convert to fraction form
    79,137.84/109,213.20 = 45,151.92/x
  3. Step 3: Cross multiply
    79,137.84x = 109,213.20 × 45,151.92
  4. Step 4: Simplify right side
    79,137.84x = 4,931,185,669.34
  5. Step 5: Solve for x
    x = 4,931,185,669.34/79,137.84
  6. Step 6: Final answer
    x = 62,311.35

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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.