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Finding the Fourth Proportional to 128,796.48, 177,750.72 and 75,098.88

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Solution

The fourth proportional to 128,796.48, 177,750.72 and 75,098.88 is: 103,643.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,796.48 : 177,750.72 = 75,098.88 : x
  2. Step 2: Convert to fraction form
    128,796.48/177,750.72 = 75,098.88/x
  3. Step 3: Cross multiply
    128,796.48x = 177,750.72 × 75,098.88
  4. Step 4: Simplify right side
    128,796.48x = 13,348,879,991.19
  5. Step 5: Solve for x
    x = 13,348,879,991.19/128,796.48
  6. Step 6: Final answer
    x = 103,643.21

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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.