Home / 128,565.28-177,435.93-77,607.28

Finding the Fourth Proportional to 128,565.28, 177,435.93 and 77,607.28

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Solution

The fourth proportional to 128,565.28, 177,435.93 and 77,607.28 is: 107,107.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,565.28 : 177,435.93 = 77,607.28 : x
  2. Step 2: Convert to fraction form
    128,565.28/177,435.93 = 77,607.28/x
  3. Step 3: Cross multiply
    128,565.28x = 177,435.93 × 77,607.28
  4. Step 4: Simplify right side
    128,565.28x = 13,770,319,901.57
  5. Step 5: Solve for x
    x = 13,770,319,901.57/128,565.28
  6. Step 6: Final answer
    x = 107,107.61

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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.