Home / 100,436.91-138,598.27-55,113.76

Finding the Fourth Proportional to 100,436.91, 138,598.27 and 55,113.76

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Solution

The fourth proportional to 100,436.91, 138,598.27 and 55,113.76 is: 76,054.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,436.91 : 138,598.27 = 55,113.76 : x
  2. Step 2: Convert to fraction form
    100,436.91/138,598.27 = 55,113.76/x
  3. Step 3: Cross multiply
    100,436.91x = 138,598.27 × 55,113.76
  4. Step 4: Simplify right side
    100,436.91x = 7,638,671,789.20
  5. Step 5: Solve for x
    x = 7,638,671,789.20/100,436.91
  6. Step 6: Final answer
    x = 76,054.43

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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.