Home / 100,444.78-138,612.51-55,123.18

Finding the Fourth Proportional to 100,444.78, 138,612.51 and 55,123.18

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Solution

The fourth proportional to 100,444.78, 138,612.51 and 55,123.18 is: 76,069.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,444.78 : 138,612.51 = 55,123.18 : x
  2. Step 2: Convert to fraction form
    100,444.78/138,612.51 = 55,123.18/x
  3. Step 3: Cross multiply
    100,444.78x = 138,612.51 × 55,123.18
  4. Step 4: Simplify right side
    100,444.78x = 7,640,762,338.98
  5. Step 5: Solve for x
    x = 7,640,762,338.98/100,444.78
  6. Step 6: Final answer
    x = 76,069.28

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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.