Home / 72,688.20-100,249.69-51,249.39

Finding the Fourth Proportional to 72,688.20, 100,249.69 and 51,249.39

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Solution

The fourth proportional to 72,688.20, 100,249.69 and 51,249.39 is: 70,681.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,688.20 : 100,249.69 = 51,249.39 : x
  2. Step 2: Convert to fraction form
    72,688.20/100,249.69 = 51,249.39/x
  3. Step 3: Cross multiply
    72,688.20x = 100,249.69 × 51,249.39
  4. Step 4: Simplify right side
    72,688.20x = 5,137,735,460.19
  5. Step 5: Solve for x
    x = 5,137,735,460.19/72,688.20
  6. Step 6: Final answer
    x = 70,681.84

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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.