Home / 128,370.27-177,137.33-71,000.47

Finding the Fourth Proportional to 128,370.27, 177,137.33 and 71,000.47

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Solution

The fourth proportional to 128,370.27, 177,137.33 and 71,000.47 is: 97,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,370.27 : 177,137.33 = 71,000.47 : x
  2. Step 2: Convert to fraction form
    128,370.27/177,137.33 = 71,000.47/x
  3. Step 3: Cross multiply
    128,370.27x = 177,137.33 × 71,000.47
  4. Step 4: Simplify right side
    128,370.27x = 12,576,833,684.55
  5. Step 5: Solve for x
    x = 12,576,833,684.55/128,370.27
  6. Step 6: Final answer
    x = 97,973.10

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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.