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Finding the Fourth Proportional to 105,659.64, 145,814.04 and 57,912.98

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Solution

The fourth proportional to 105,659.64, 145,814.04 and 57,912.98 is: 79,921.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,659.64 : 145,814.04 = 57,912.98 : x
  2. Step 2: Convert to fraction form
    105,659.64/145,814.04 = 57,912.98/x
  3. Step 3: Cross multiply
    105,659.64x = 145,814.04 × 57,912.98
  4. Step 4: Simplify right side
    105,659.64x = 8,444,524,853.17
  5. Step 5: Solve for x
    x = 8,444,524,853.17/105,659.64
  6. Step 6: Final answer
    x = 79,921.95

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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.