Home / 281,145.47-387,990.41-153,821.03

Finding the Fourth Proportional to 281,145.47, 387,990.41 and 153,821.03

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Solution

The fourth proportional to 281,145.47, 387,990.41 and 153,821.03 is: 212,278.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,145.47 : 387,990.41 = 153,821.03 : x
  2. Step 2: Convert to fraction form
    281,145.47/387,990.41 = 153,821.03/x
  3. Step 3: Cross multiply
    281,145.47x = 387,990.41 × 153,821.03
  4. Step 4: Simplify right side
    281,145.47x = 59,681,081,787.27
  5. Step 5: Solve for x
    x = 59,681,081,787.27/281,145.47
  6. Step 6: Final answer
    x = 212,278.30

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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.