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Finding the Fourth Proportional to 100,912.38, 139,259.12 and 58,495.51

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Solution

The fourth proportional to 100,912.38, 139,259.12 and 58,495.51 is: 80,723.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,912.38 : 139,259.12 = 58,495.51 : x
  2. Step 2: Convert to fraction form
    100,912.38/139,259.12 = 58,495.51/x
  3. Step 3: Cross multiply
    100,912.38x = 139,259.12 × 58,495.51
  4. Step 4: Simplify right side
    100,912.38x = 8,146,033,246.55
  5. Step 5: Solve for x
    x = 8,146,033,246.55/100,912.38
  6. Step 6: Final answer
    x = 80,723.82

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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.