Home / 118,142.74-162,988.77-72,178.48

Finding the Fourth Proportional to 118,142.74, 162,988.77 and 72,178.48

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Solution

The fourth proportional to 118,142.74, 162,988.77 and 72,178.48 is: 99,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,142.74 : 162,988.77 = 72,178.48 : x
  2. Step 2: Convert to fraction form
    118,142.74/162,988.77 = 72,178.48/x
  3. Step 3: Cross multiply
    118,142.74x = 162,988.77 × 72,178.48
  4. Step 4: Simplify right side
    118,142.74x = 11,764,281,675.67
  5. Step 5: Solve for x
    x = 11,764,281,675.67/118,142.74
  6. Step 6: Final answer
    x = 99,576.85

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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.