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Finding the Fourth Proportional to 93,780, 129,415.32 and 50,758.52

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Solution

The fourth proportional to 93,780, 129,415.32 and 50,758.52 is: 70,046.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,780 : 129,415.32 = 50,758.52 : x
  2. Step 2: Convert to fraction form
    93,780/129,415.32 = 50,758.52/x
  3. Step 3: Cross multiply
    93,780x = 129,415.32 × 50,758.52
  4. Step 4: Simplify right side
    93,780x = 6,568,929,461.45
  5. Step 5: Solve for x
    x = 6,568,929,461.45/93,780
  6. Step 6: Final answer
    x = 70,046.17

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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.