Home / 281,421.77-388,366.34-154,109.21

Finding the Fourth Proportional to 281,421.77, 388,366.34 and 154,109.21

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Solution

The fourth proportional to 281,421.77, 388,366.34 and 154,109.21 is: 212,673.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,421.77 : 388,366.34 = 154,109.21 : x
  2. Step 2: Convert to fraction form
    281,421.77/388,366.34 = 154,109.21/x
  3. Step 3: Cross multiply
    281,421.77x = 388,366.34 × 154,109.21
  4. Step 4: Simplify right side
    281,421.77x = 59,850,827,135.61
  5. Step 5: Solve for x
    x = 59,850,827,135.61/281,421.77
  6. Step 6: Final answer
    x = 212,673.06

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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.