Home / 128,370.17-177,137.20-71,000.37

Finding the Fourth Proportional to 128,370.17, 177,137.20 and 71,000.37

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Solution

The fourth proportional to 128,370.17, 177,137.20 and 71,000.37 is: 97,972.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,370.17 : 177,137.20 = 71,000.37 : x
  2. Step 2: Convert to fraction form
    128,370.17/177,137.20 = 71,000.37/x
  3. Step 3: Cross multiply
    128,370.17x = 177,137.20 × 71,000.37
  4. Step 4: Simplify right side
    128,370.17x = 12,576,806,563.26
  5. Step 5: Solve for x
    x = 12,576,806,563.26/128,370.17
  6. Step 6: Final answer
    x = 97,972.97

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1.5x scale

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.