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Finding the Fourth Proportional to 109,376.10, 164,064.15 and 91,880.10

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Solution

The fourth proportional to 109,376.10, 164,064.15 and 91,880.10 is: 137,820.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,376.10 : 164,064.15 = 91,880.10 : x
  2. Step 2: Convert to fraction form
    109,376.10/164,064.15 = 91,880.10/x
  3. Step 3: Cross multiply
    109,376.10x = 164,064.15 × 91,880.10
  4. Step 4: Simplify right side
    109,376.10x = 15,074,230,508.42
  5. Step 5: Solve for x
    x = 15,074,230,508.42/109,376.10
  6. Step 6: Final answer
    x = 137,820.15

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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.