Home / 100,384.40-138,529.52-55,061.44

Finding the Fourth Proportional to 100,384.40, 138,529.52 and 55,061.44

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Solution

The fourth proportional to 100,384.40, 138,529.52 and 55,061.44 is: 75,984.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,384.40 : 138,529.52 = 55,061.44 : x
  2. Step 2: Convert to fraction form
    100,384.40/138,529.52 = 55,061.44/x
  3. Step 3: Cross multiply
    100,384.40x = 138,529.52 × 55,061.44
  4. Step 4: Simplify right side
    100,384.40x = 7,627,634,853.71
  5. Step 5: Solve for x
    x = 7,627,634,853.71/100,384.40
  6. Step 6: Final answer
    x = 75,984.27

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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.