Home / 190,709.76-286,157.56-78,423.72

Finding the Fourth Proportional to 190,709.76, 286,157.56 and 78,423.72

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Solution

The fourth proportional to 190,709.76, 286,157.56 and 78,423.72 is: 117,673.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,709.76 : 286,157.56 = 78,423.72 : x
  2. Step 2: Convert to fraction form
    190,709.76/286,157.56 = 78,423.72/x
  3. Step 3: Cross multiply
    190,709.76x = 286,157.56 × 78,423.72
  4. Step 4: Simplify right side
    190,709.76x = 22,441,540,361.32
  5. Step 5: Solve for x
    x = 22,441,540,361.32/190,709.76
  6. Step 6: Final answer
    x = 117,673.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.