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Finding the Fourth Proportional to 76,696.56, 105,838.92 and 42,706.80

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Solution

The fourth proportional to 76,696.56, 105,838.92 and 42,706.80 is: 58,934.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,696.56 : 105,838.92 = 42,706.80 : x
  2. Step 2: Convert to fraction form
    76,696.56/105,838.92 = 42,706.80/x
  3. Step 3: Cross multiply
    76,696.56x = 105,838.92 × 42,706.80
  4. Step 4: Simplify right side
    76,696.56x = 4,520,041,588.66
  5. Step 5: Solve for x
    x = 4,520,041,588.66/76,696.56
  6. Step 6: Final answer
    x = 58,934.09

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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.