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Finding the Fourth Proportional to 76,503.80, 105,573.13 and 42,511.41

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Solution

The fourth proportional to 76,503.80, 105,573.13 and 42,511.41 is: 58,664.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,503.80 : 105,573.13 = 42,511.41 : x
  2. Step 2: Convert to fraction form
    76,503.80/105,573.13 = 42,511.41/x
  3. Step 3: Cross multiply
    76,503.80x = 105,573.13 × 42,511.41
  4. Step 4: Simplify right side
    76,503.80x = 4,488,062,614.41
  5. Step 5: Solve for x
    x = 4,488,062,614.41/76,503.80
  6. Step 6: Final answer
    x = 58,664.57

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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.