Home / 100,423.79-138,587.38-55,101.76

Finding the Fourth Proportional to 100,423.79, 138,587.38 and 55,101.76

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Solution

The fourth proportional to 100,423.79, 138,587.38 and 55,101.76 is: 76,041.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,423.79 : 138,587.38 = 55,101.76 : x
  2. Step 2: Convert to fraction form
    100,423.79/138,587.38 = 55,101.76/x
  3. Step 3: Cross multiply
    100,423.79x = 138,587.38 × 55,101.76
  4. Step 4: Simplify right side
    100,423.79x = 7,636,408,551.79
  5. Step 5: Solve for x
    x = 7,636,408,551.79/100,423.79
  6. Step 6: Final answer
    x = 76,041.83

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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.