Home / 281,108.09-387,938.33-153,783.68

Finding the Fourth Proportional to 281,108.09, 387,938.33 and 153,783.68

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Solution

The fourth proportional to 281,108.09, 387,938.33 and 153,783.68 is: 212,226.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,108.09 : 387,938.33 = 153,783.68 : x
  2. Step 2: Convert to fraction form
    281,108.09/387,938.33 = 153,783.68/x
  3. Step 3: Cross multiply
    281,108.09x = 387,938.33 × 153,783.68
  4. Step 4: Simplify right side
    281,108.09x = 59,658,584,000.45
  5. Step 5: Solve for x
    x = 59,658,584,000.45/281,108.09
  6. Step 6: Final answer
    x = 212,226.49

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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.