Home / 154,839.28-213,681.44-87,771.28

Finding the Fourth Proportional to 154,839.28, 213,681.44 and 87,771.28

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Solution

The fourth proportional to 154,839.28, 213,681.44 and 87,771.28 is: 121,126.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,839.28 : 213,681.44 = 87,771.28 : x
  2. Step 2: Convert to fraction form
    154,839.28/213,681.44 = 87,771.28/x
  3. Step 3: Cross multiply
    154,839.28x = 213,681.44 × 87,771.28
  4. Step 4: Simplify right side
    154,839.28x = 18,755,093,501.04
  5. Step 5: Solve for x
    x = 18,755,093,501.04/154,839.28
  6. Step 6: Final answer
    x = 121,126.20

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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.