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Finding the Fourth Proportional to 128,907.77, 177,925.42 and 88,088.42

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Solution

The fourth proportional to 128,907.77, 177,925.42 and 88,088.42 is: 121,584.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,907.77 : 177,925.42 = 88,088.42 : x
  2. Step 2: Convert to fraction form
    128,907.77/177,925.42 = 88,088.42/x
  3. Step 3: Cross multiply
    128,907.77x = 177,925.42 × 88,088.42
  4. Step 4: Simplify right side
    128,907.77x = 15,673,169,680.56
  5. Step 5: Solve for x
    x = 15,673,169,680.56/128,907.77
  6. Step 6: Final answer
    x = 121,584.37

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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.