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Finding the Fourth Proportional to 100,930.50, 139,284.09 and 58,513.64

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Solution

The fourth proportional to 100,930.50, 139,284.09 and 58,513.64 is: 80,748.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,930.50 : 139,284.09 = 58,513.64 : x
  2. Step 2: Convert to fraction form
    100,930.50/139,284.09 = 58,513.64/x
  3. Step 3: Cross multiply
    100,930.50x = 139,284.09 × 58,513.64
  4. Step 4: Simplify right side
    100,930.50x = 8,150,018,403.57
  5. Step 5: Solve for x
    x = 8,150,018,403.57/100,930.50
  6. Step 6: Final answer
    x = 80,748.82

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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.