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Finding the Fourth Proportional to 76,903.57, 106,126.58 and 42,910.07

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Solution

The fourth proportional to 76,903.57, 106,126.58 and 42,910.07 is: 59,215.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,903.57 : 106,126.58 = 42,910.07 : x
  2. Step 2: Convert to fraction form
    76,903.57/106,126.58 = 42,910.07/x
  3. Step 3: Cross multiply
    76,903.57x = 106,126.58 × 42,910.07
  4. Step 4: Simplify right side
    76,903.57x = 4,553,899,027.43
  5. Step 5: Solve for x
    x = 4,553,899,027.43/76,903.57
  6. Step 6: Final answer
    x = 59,215.71

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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.