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Finding the Fourth Proportional to 128,792.82, 177,579.63 and 83,454.26

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Solution

The fourth proportional to 128,792.82, 177,579.63 and 83,454.26 is: 115,066.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,792.82 : 177,579.63 = 83,454.26 : x
  2. Step 2: Convert to fraction form
    128,792.82/177,579.63 = 83,454.26/x
  3. Step 3: Cross multiply
    128,792.82x = 177,579.63 × 83,454.26
  4. Step 4: Simplify right side
    128,792.82x = 14,819,776,612.72
  5. Step 5: Solve for x
    x = 14,819,776,612.72/128,792.82
  6. Step 6: Final answer
    x = 115,066.79

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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.