Home / 118,143.24-162,989.46-72,178.98

Finding the Fourth Proportional to 118,143.24, 162,989.46 and 72,178.98

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Solution

The fourth proportional to 118,143.24, 162,989.46 and 72,178.98 is: 99,577.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,143.24 : 162,989.46 = 72,178.98 : x
  2. Step 2: Convert to fraction form
    118,143.24/162,989.46 = 72,178.98/x
  3. Step 3: Cross multiply
    118,143.24x = 162,989.46 × 72,178.98
  4. Step 4: Simplify right side
    118,143.24x = 11,764,412,973.55
  5. Step 5: Solve for x
    x = 11,764,412,973.55/118,143.24
  6. Step 6: Final answer
    x = 99,577.54

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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.