Home / 128,845.72-177,829.32-75,162.16

Finding the Fourth Proportional to 128,845.72, 177,829.32 and 75,162.16

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Solution

The fourth proportional to 128,845.72, 177,829.32 and 75,162.16 is: 103,736.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,845.72 : 177,829.32 = 75,162.16 : x
  2. Step 2: Convert to fraction form
    128,845.72/177,829.32 = 75,162.16/x
  3. Step 3: Cross multiply
    128,845.72x = 177,829.32 × 75,162.16
  4. Step 4: Simplify right side
    128,845.72x = 13,366,035,802.53
  5. Step 5: Solve for x
    x = 13,366,035,802.53/128,845.72
  6. Step 6: Final answer
    x = 103,736.75

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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.