Home / 128,746.81-177,664.41-71,388.46

Finding the Fourth Proportional to 128,746.81, 177,664.41 and 71,388.46

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Solution

The fourth proportional to 128,746.81, 177,664.41 and 71,388.46 is: 98,512.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,746.81 : 177,664.41 = 71,388.46 : x
  2. Step 2: Convert to fraction form
    128,746.81/177,664.41 = 71,388.46/x
  3. Step 3: Cross multiply
    128,746.81x = 177,664.41 × 71,388.46
  4. Step 4: Simplify right side
    128,746.81x = 12,683,188,626.71
  5. Step 5: Solve for x
    x = 12,683,188,626.71/128,746.81
  6. Step 6: Final answer
    x = 98,512.64

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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.