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Finding the Fourth Proportional to 138,844.72, 191,605.44 and 75,182.32

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Solution

The fourth proportional to 138,844.72, 191,605.44 and 75,182.32 is: 103,751.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,844.72 : 191,605.44 = 75,182.32 : x
  2. Step 2: Convert to fraction form
    138,844.72/191,605.44 = 75,182.32/x
  3. Step 3: Cross multiply
    138,844.72x = 191,605.44 × 75,182.32
  4. Step 4: Simplify right side
    138,844.72x = 14,405,341,503.82
  5. Step 5: Solve for x
    x = 14,405,341,503.82/138,844.72
  6. Step 6: Final answer
    x = 103,751.45

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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.