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Finding the Fourth Proportional to 128,255.48, 177,041.96 and 114,803

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Solution

The fourth proportional to 128,255.48, 177,041.96 and 114,803 is: 158,472.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,255.48 : 177,041.96 = 114,803 : x
  2. Step 2: Convert to fraction form
    128,255.48/177,041.96 = 114,803/x
  3. Step 3: Cross multiply
    128,255.48x = 177,041.96 × 114,803
  4. Step 4: Simplify right side
    128,255.48x = 20,324,948,133.88
  5. Step 5: Solve for x
    x = 20,324,948,133.88/128,255.48
  6. Step 6: Final answer
    x = 158,472.36

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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.