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Finding the Fourth Proportional to 109,659.61, 151,328.95 and 61,914.97

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Solution

The fourth proportional to 109,659.61, 151,328.95 and 61,914.97 is: 85,441.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,659.61 : 151,328.95 = 61,914.97 : x
  2. Step 2: Convert to fraction form
    109,659.61/151,328.95 = 61,914.97/x
  3. Step 3: Cross multiply
    109,659.61x = 151,328.95 × 61,914.97
  4. Step 4: Simplify right side
    109,659.61x = 9,369,527,399.38
  5. Step 5: Solve for x
    x = 9,369,527,399.38/109,659.61
  6. Step 6: Final answer
    x = 85,441.92

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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.