Home / 142,381.68-196,469.40-78,710.64

Finding the Fourth Proportional to 142,381.68, 196,469.40 and 78,710.64

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Solution

The fourth proportional to 142,381.68, 196,469.40 and 78,710.64 is: 108,611.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,381.68 : 196,469.40 = 78,710.64 : x
  2. Step 2: Convert to fraction form
    142,381.68/196,469.40 = 78,710.64/x
  3. Step 3: Cross multiply
    142,381.68x = 196,469.40 × 78,710.64
  4. Step 4: Simplify right side
    142,381.68x = 15,464,232,214.42
  5. Step 5: Solve for x
    x = 15,464,232,214.42/142,381.68
  6. Step 6: Final answer
    x = 108,611.11

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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.