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Finding the Fourth Proportional to 100,912.96, 139,259.90 and 58,496.10

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Solution

The fourth proportional to 100,912.96, 139,259.90 and 58,496.10 is: 80,724.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,912.96 : 139,259.90 = 58,496.10 : x
  2. Step 2: Convert to fraction form
    100,912.96/139,259.90 = 58,496.10/x
  3. Step 3: Cross multiply
    100,912.96x = 139,259.90 × 58,496.10
  4. Step 4: Simplify right side
    100,912.96x = 8,146,161,036.39
  5. Step 5: Solve for x
    x = 8,146,161,036.39/100,912.96
  6. Step 6: Final answer
    x = 80,724.63

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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.