Home / 142,849.87-197,135.04-78,325.00

Finding the Fourth Proportional to 142,849.87, 197,135.04 and 78,325.00

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Solution

The fourth proportional to 142,849.87, 197,135.04 and 78,325.00 is: 108,089.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,849.87 : 197,135.04 = 78,325.00 : x
  2. Step 2: Convert to fraction form
    142,849.87/197,135.04 = 78,325.00/x
  3. Step 3: Cross multiply
    142,849.87x = 197,135.04 × 78,325.00
  4. Step 4: Simplify right side
    142,849.87x = 15,440,601,515.16
  5. Step 5: Solve for x
    x = 15,440,601,515.16/142,849.87
  6. Step 6: Final answer
    x = 108,089.72

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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.