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Finding the Fourth Proportional to 128,107.17, 192,278.88 and 64,971.59

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Solution

The fourth proportional to 128,107.17, 192,278.88 and 64,971.59 is: 97,517.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.17 : 192,278.88 = 64,971.59 : x
  2. Step 2: Convert to fraction form
    128,107.17/192,278.88 = 64,971.59/x
  3. Step 3: Cross multiply
    128,107.17x = 192,278.88 × 64,971.59
  4. Step 4: Simplify right side
    128,107.17x = 12,492,663,595.62
  5. Step 5: Solve for x
    x = 12,492,663,595.62/128,107.17
  6. Step 6: Final answer
    x = 97,517.29

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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.