Home / 100,634.85-138,876.21-55,312.83

Finding the Fourth Proportional to 100,634.85, 138,876.21 and 55,312.83

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Solution

The fourth proportional to 100,634.85, 138,876.21 and 55,312.83 is: 76,331.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,634.85 : 138,876.21 = 55,312.83 : x
  2. Step 2: Convert to fraction form
    100,634.85/138,876.21 = 55,312.83/x
  3. Step 3: Cross multiply
    100,634.85x = 138,876.21 × 55,312.83
  4. Step 4: Simplify right side
    100,634.85x = 7,681,636,194.77
  5. Step 5: Solve for x
    x = 7,681,636,194.77/100,634.85
  6. Step 6: Final answer
    x = 76,331.77

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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.