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Finding the Fourth Proportional to 138,467.70, 191,085.60 and 74,805.50

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Solution

The fourth proportional to 138,467.70, 191,085.60 and 74,805.50 is: 103,231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,467.70 : 191,085.60 = 74,805.50 : x
  2. Step 2: Convert to fraction form
    138,467.70/191,085.60 = 74,805.50/x
  3. Step 3: Cross multiply
    138,467.70x = 191,085.60 × 74,805.50
  4. Step 4: Simplify right side
    138,467.70x = 14,294,252,895.37
  5. Step 5: Solve for x
    x = 14,294,252,895.37/138,467.70
  6. Step 6: Final answer
    x = 103,231.68

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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.