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Finding the Fourth Proportional to 109,471.79, 151,072.74 and 64,138.92

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Solution

The fourth proportional to 109,471.79, 151,072.74 and 64,138.92 is: 88,512.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,471.79 : 151,072.74 = 64,138.92 : x
  2. Step 2: Convert to fraction form
    109,471.79/151,072.74 = 64,138.92/x
  3. Step 3: Cross multiply
    109,471.79x = 151,072.74 × 64,138.92
  4. Step 4: Simplify right side
    109,471.79x = 9,689,642,385.04
  5. Step 5: Solve for x
    x = 9,689,642,385.04/109,471.79
  6. Step 6: Final answer
    x = 88,512.69

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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.