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Finding the Fourth Proportional to 76,384.25, 105,410.99 and 42,850.97

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Solution

The fourth proportional to 76,384.25, 105,410.99 and 42,850.97 is: 59,134.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,384.25 : 105,410.99 = 42,850.97 : x
  2. Step 2: Convert to fraction form
    76,384.25/105,410.99 = 42,850.97/x
  3. Step 3: Cross multiply
    76,384.25x = 105,410.99 × 42,850.97
  4. Step 4: Simplify right side
    76,384.25x = 4,516,962,955.91
  5. Step 5: Solve for x
    x = 4,516,962,955.91/76,384.25
  6. Step 6: Final answer
    x = 59,134.74

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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.