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Finding the Fourth Proportional to 101,950.12, 140,688.12 and 57,238.12

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Solution

The fourth proportional to 101,950.12, 140,688.12 and 57,238.12 is: 78,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,950.12 : 140,688.12 = 57,238.12 : x
  2. Step 2: Convert to fraction form
    101,950.12/140,688.12 = 57,238.12/x
  3. Step 3: Cross multiply
    101,950.12x = 140,688.12 × 57,238.12
  4. Step 4: Simplify right side
    101,950.12x = 8,052,723,495.13
  5. Step 5: Solve for x
    x = 8,052,723,495.13/101,950.12
  6. Step 6: Final answer
    x = 78,986.90

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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.