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Finding the Fourth Proportional to 128,602.76, 177,518.38 and 104,687.92

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Solution

The fourth proportional to 128,602.76, 177,518.38 and 104,687.92 is: 144,507.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.76 : 177,518.38 = 104,687.92 : x
  2. Step 2: Convert to fraction form
    128,602.76/177,518.38 = 104,687.92/x
  3. Step 3: Cross multiply
    128,602.76x = 177,518.38 × 104,687.92
  4. Step 4: Simplify right side
    128,602.76x = 18,584,029,963.97
  5. Step 5: Solve for x
    x = 18,584,029,963.97/128,602.76
  6. Step 6: Final answer
    x = 144,507.24

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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.