Home / 281,220.12-388,084.32-153,903.78

Finding the Fourth Proportional to 281,220.12, 388,084.32 and 153,903.78

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Solution

The fourth proportional to 281,220.12, 388,084.32 and 153,903.78 is: 212,387.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,220.12 : 388,084.32 = 153,903.78 : x
  2. Step 2: Convert to fraction form
    281,220.12/388,084.32 = 153,903.78/x
  3. Step 3: Cross multiply
    281,220.12x = 388,084.32 × 153,903.78
  4. Step 4: Simplify right side
    281,220.12x = 59,727,643,806.73
  5. Step 5: Solve for x
    x = 59,727,643,806.73/281,220.12
  6. Step 6: Final answer
    x = 212,387.52

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1.5x scale

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.