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Finding the Fourth Proportional to 128,798.48, 177,753.48 and 75,100.88

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Solution

The fourth proportional to 128,798.48, 177,753.48 and 75,100.88 is: 103,645.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,798.48 : 177,753.48 = 75,100.88 : x
  2. Step 2: Convert to fraction form
    128,798.48/177,753.48 = 75,100.88/x
  3. Step 3: Cross multiply
    128,798.48x = 177,753.48 × 75,100.88
  4. Step 4: Simplify right side
    128,798.48x = 13,349,442,771.06
  5. Step 5: Solve for x
    x = 13,349,442,771.06/128,798.48
  6. Step 6: Final answer
    x = 103,645.97

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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.