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Finding the Fourth Proportional to 134,878.84, 186,018.53 and 81,153.82

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Solution

The fourth proportional to 134,878.84, 186,018.53 and 81,153.82 is: 111,923.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,878.84 : 186,018.53 = 81,153.82 : x
  2. Step 2: Convert to fraction form
    134,878.84/186,018.53 = 81,153.82/x
  3. Step 3: Cross multiply
    134,878.84x = 186,018.53 × 81,153.82
  4. Step 4: Simplify right side
    134,878.84x = 15,096,113,080.68
  5. Step 5: Solve for x
    x = 15,096,113,080.68/134,878.84
  6. Step 6: Final answer
    x = 111,923.51

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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.