Home / 128,372.52-177,160.26-71,011.56

Finding the Fourth Proportional to 128,372.52, 177,160.26 and 71,011.56

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Solution

The fourth proportional to 128,372.52, 177,160.26 and 71,011.56 is: 97,999.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,372.52 : 177,160.26 = 71,011.56 : x
  2. Step 2: Convert to fraction form
    128,372.52/177,160.26 = 71,011.56/x
  3. Step 3: Cross multiply
    128,372.52x = 177,160.26 × 71,011.56
  4. Step 4: Simplify right side
    128,372.52x = 12,580,426,432.61
  5. Step 5: Solve for x
    x = 12,580,426,432.61/128,372.52
  6. Step 6: Final answer
    x = 97,999.37

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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.