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Finding the Fourth Proportional to 138,558.32, 191,210.44 and 74,896.08

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Solution

The fourth proportional to 138,558.32, 191,210.44 and 74,896.08 is: 103,356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,558.32 : 191,210.44 = 74,896.08 : x
  2. Step 2: Convert to fraction form
    138,558.32/191,210.44 = 74,896.08/x
  3. Step 3: Cross multiply
    138,558.32x = 191,210.44 × 74,896.08
  4. Step 4: Simplify right side
    138,558.32x = 14,320,912,411.08
  5. Step 5: Solve for x
    x = 14,320,912,411.08/138,558.32
  6. Step 6: Final answer
    x = 103,356.57

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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.