Home / 128,072.34-176,732.64-71,487.36

Finding the Fourth Proportional to 128,072.34, 176,732.64 and 71,487.36

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Solution

The fourth proportional to 128,072.34, 176,732.64 and 71,487.36 is: 98,648.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,072.34 : 176,732.64 = 71,487.36 : x
  2. Step 2: Convert to fraction form
    128,072.34/176,732.64 = 71,487.36/x
  3. Step 3: Cross multiply
    128,072.34x = 176,732.64 × 71,487.36
  4. Step 4: Simplify right side
    128,072.34x = 12,634,149,859.43
  5. Step 5: Solve for x
    x = 12,634,149,859.43/128,072.34
  6. Step 6: Final answer
    x = 98,648.54

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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.