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Finding the Fourth Proportional to 281,039.95, 387,844.37 and 153,715.54

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Solution

The fourth proportional to 281,039.95, 387,844.37 and 153,715.54 is: 212,132.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,039.95 : 387,844.37 = 153,715.54 : x
  2. Step 2: Convert to fraction form
    281,039.95/387,844.37 = 153,715.54/x
  3. Step 3: Cross multiply
    281,039.95x = 387,844.37 × 153,715.54
  4. Step 4: Simplify right side
    281,039.95x = 59,617,706,770.51
  5. Step 5: Solve for x
    x = 59,617,706,770.51/281,039.95
  6. Step 6: Final answer
    x = 212,132.50

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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.