Home / 142,836.21-197,115.93-78,311.52

Finding the Fourth Proportional to 142,836.21, 197,115.93 and 78,311.52

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Solution

The fourth proportional to 142,836.21, 197,115.93 and 78,311.52 is: 108,070.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,836.21 : 197,115.93 = 78,311.52 : x
  2. Step 2: Convert to fraction form
    142,836.21/197,115.93 = 78,311.52/x
  3. Step 3: Cross multiply
    142,836.21x = 197,115.93 × 78,311.52
  4. Step 4: Simplify right side
    142,836.21x = 15,436,448,094.51
  5. Step 5: Solve for x
    x = 15,436,448,094.51/142,836.21
  6. Step 6: Final answer
    x = 108,070.97

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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.