Home / 100,445.03-138,612.86-55,123.43

Finding the Fourth Proportional to 100,445.03, 138,612.86 and 55,123.43

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Solution

The fourth proportional to 100,445.03, 138,612.86 and 55,123.43 is: 76,069.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,445.03 : 138,612.86 = 55,123.43 : x
  2. Step 2: Convert to fraction form
    100,445.03/138,612.86 = 55,123.43/x
  3. Step 3: Cross multiply
    100,445.03x = 138,612.86 × 55,123.43
  4. Step 4: Simplify right side
    100,445.03x = 7,640,816,009.69
  5. Step 5: Solve for x
    x = 7,640,816,009.69/100,445.03
  6. Step 6: Final answer
    x = 76,069.63

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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.