Home / 142,299.59-196,365.72-78,633.28

Finding the Fourth Proportional to 142,299.59, 196,365.72 and 78,633.28

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Solution

The fourth proportional to 142,299.59, 196,365.72 and 78,633.28 is: 108,509.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,299.59 : 196,365.72 = 78,633.28 : x
  2. Step 2: Convert to fraction form
    142,299.59/196,365.72 = 78,633.28/x
  3. Step 3: Cross multiply
    142,299.59x = 196,365.72 × 78,633.28
  4. Step 4: Simplify right side
    142,299.59x = 15,440,880,741.18
  5. Step 5: Solve for x
    x = 15,440,880,741.18/142,299.59
  6. Step 6: Final answer
    x = 108,509.67

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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.