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Finding the Fourth Proportional to 76,656.70, 105,786.07 and 43,122.70

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Solution

The fourth proportional to 76,656.70, 105,786.07 and 43,122.70 is: 59,509.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,656.70 : 105,786.07 = 43,122.70 : x
  2. Step 2: Convert to fraction form
    76,656.70/105,786.07 = 43,122.70/x
  3. Step 3: Cross multiply
    76,656.70x = 105,786.07 × 43,122.70
  4. Step 4: Simplify right side
    76,656.70x = 4,561,780,960.79
  5. Step 5: Solve for x
    x = 4,561,780,960.79/76,656.70
  6. Step 6: Final answer
    x = 59,509.23

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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.