Home / 100,663.45-138,916.46-54,723.18

Finding the Fourth Proportional to 100,663.45, 138,916.46 and 54,723.18

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Solution

The fourth proportional to 100,663.45, 138,916.46 and 54,723.18 is: 75,518.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,663.45 : 138,916.46 = 54,723.18 : x
  2. Step 2: Convert to fraction form
    100,663.45/138,916.46 = 54,723.18/x
  3. Step 3: Cross multiply
    100,663.45x = 138,916.46 × 54,723.18
  4. Step 4: Simplify right side
    100,663.45x = 7,601,950,445.54
  5. Step 5: Solve for x
    x = 7,601,950,445.54/100,663.45
  6. Step 6: Final answer
    x = 75,518.48

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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.