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Finding the Fourth Proportional to 100,754.67, 139,041.45 and 55,431.69

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Solution

The fourth proportional to 100,754.67, 139,041.45 and 55,431.69 is: 76,495.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,754.67 : 139,041.45 = 55,431.69 : x
  2. Step 2: Convert to fraction form
    100,754.67/139,041.45 = 55,431.69/x
  3. Step 3: Cross multiply
    100,754.67x = 139,041.45 × 55,431.69
  4. Step 4: Simplify right side
    100,754.67x = 7,707,302,553.55
  5. Step 5: Solve for x
    x = 7,707,302,553.55/100,754.67
  6. Step 6: Final answer
    x = 76,495.74

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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.