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Finding the Fourth Proportional to 100,942.41, 139,292.42 and 58,503.68

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Solution

The fourth proportional to 100,942.41, 139,292.42 and 58,503.68 is: 80,730.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,942.41 : 139,292.42 = 58,503.68 : x
  2. Step 2: Convert to fraction form
    100,942.41/139,292.42 = 58,503.68/x
  3. Step 3: Cross multiply
    100,942.41x = 139,292.42 × 58,503.68
  4. Step 4: Simplify right side
    100,942.41x = 8,149,119,166.11
  5. Step 5: Solve for x
    x = 8,149,119,166.11/100,942.41
  6. Step 6: Final answer
    x = 80,730.38

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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.