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Finding the Fourth Proportional to 281,756.95, 388,824.57 and 154,429.81

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Solution

The fourth proportional to 281,756.95, 388,824.57 and 154,429.81 is: 213,113.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,756.95 : 388,824.57 = 154,429.81 : x
  2. Step 2: Convert to fraction form
    281,756.95/388,824.57 = 154,429.81/x
  3. Step 3: Cross multiply
    281,756.95x = 388,824.57 × 154,429.81
  4. Step 4: Simplify right side
    281,756.95x = 60,046,104,468.43
  5. Step 5: Solve for x
    x = 60,046,104,468.43/281,756.95
  6. Step 6: Final answer
    x = 213,113.13

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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.