Home / 142,438.63-196,548.28-78,767.77

Finding the Fourth Proportional to 142,438.63, 196,548.28 and 78,767.77

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Solution

The fourth proportional to 142,438.63, 196,548.28 and 78,767.77 is: 108,690.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,438.63 : 196,548.28 = 78,767.77 : x
  2. Step 2: Convert to fraction form
    142,438.63/196,548.28 = 78,767.77/x
  3. Step 3: Cross multiply
    142,438.63x = 196,548.28 × 78,767.77
  4. Step 4: Simplify right side
    142,438.63x = 15,481,669,712.94
  5. Step 5: Solve for x
    x = 15,481,669,712.94/142,438.63
  6. Step 6: Final answer
    x = 108,690.11

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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.