Home / 128,831.95-177,661.49-98,283.21

Finding the Fourth Proportional to 128,831.95, 177,661.49 and 98,283.21

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Solution

The fourth proportional to 128,831.95, 177,661.49 and 98,283.21 is: 135,534.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,831.95 : 177,661.49 = 98,283.21 : x
  2. Step 2: Convert to fraction form
    128,831.95/177,661.49 = 98,283.21/x
  3. Step 3: Cross multiply
    128,831.95x = 177,661.49 × 98,283.21
  4. Step 4: Simplify right side
    128,831.95x = 17,461,140,372.94
  5. Step 5: Solve for x
    x = 17,461,140,372.94/128,831.95
  6. Step 6: Final answer
    x = 135,534.24

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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.