Home / 100,436.70-138,602.27-55,115.45

Finding the Fourth Proportional to 100,436.70, 138,602.27 and 55,115.45

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Solution

The fourth proportional to 100,436.70, 138,602.27 and 55,115.45 is: 76,059.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,436.70 : 138,602.27 = 55,115.45 : x
  2. Step 2: Convert to fraction form
    100,436.70/138,602.27 = 55,115.45/x
  3. Step 3: Cross multiply
    100,436.70x = 138,602.27 × 55,115.45
  4. Step 4: Simplify right side
    100,436.70x = 7,639,125,513.48
  5. Step 5: Solve for x
    x = 7,639,125,513.48/100,436.70
  6. Step 6: Final answer
    x = 76,059.11

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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.