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Finding the Fourth Proportional to 101,187.50, 139,631.45 and 55,865.57

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Solution

The fourth proportional to 101,187.50, 139,631.45 and 55,865.57 is: 77,090.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,187.50 : 139,631.45 = 55,865.57 : x
  2. Step 2: Convert to fraction form
    101,187.50/139,631.45 = 55,865.57/x
  3. Step 3: Cross multiply
    101,187.50x = 139,631.45 × 55,865.57
  4. Step 4: Simplify right side
    101,187.50x = 7,800,589,566.69
  5. Step 5: Solve for x
    x = 7,800,589,566.69/101,187.50
  6. Step 6: Final answer
    x = 77,090.45

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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.