Home / 129,637.44-178,831.36-89,281.28

Finding the Fourth Proportional to 129,637.44, 178,831.36 and 89,281.28

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Solution

The fourth proportional to 129,637.44, 178,831.36 and 89,281.28 is: 123,161.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,637.44 : 178,831.36 = 89,281.28 : x
  2. Step 2: Convert to fraction form
    129,637.44/178,831.36 = 89,281.28/x
  3. Step 3: Cross multiply
    129,637.44x = 178,831.36 × 89,281.28
  4. Step 4: Simplify right side
    129,637.44x = 15,966,292,724.94
  5. Step 5: Solve for x
    x = 15,966,292,724.94/129,637.44
  6. Step 6: Final answer
    x = 123,161.12

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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.