Home / 139,022.36-191,824.14-87,999.20

Finding the Fourth Proportional to 139,022.36, 191,824.14 and 87,999.20

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Solution

The fourth proportional to 139,022.36, 191,824.14 and 87,999.20 is: 121,421.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,022.36 : 191,824.14 = 87,999.20 : x
  2. Step 2: Convert to fraction form
    139,022.36/191,824.14 = 87,999.20/x
  3. Step 3: Cross multiply
    139,022.36x = 191,824.14 × 87,999.20
  4. Step 4: Simplify right side
    139,022.36x = 16,880,370,860.69
  5. Step 5: Solve for x
    x = 16,880,370,860.69/139,022.36
  6. Step 6: Final answer
    x = 121,421.98

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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.