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Finding the Fourth Proportional to 154,885.84, 213,763.26 and 91,223.08

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Solution

The fourth proportional to 154,885.84, 213,763.26 and 91,223.08 is: 125,900.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,885.84 : 213,763.26 = 91,223.08 : x
  2. Step 2: Convert to fraction form
    154,885.84/213,763.26 = 91,223.08/x
  3. Step 3: Cross multiply
    154,885.84x = 213,763.26 × 91,223.08
  4. Step 4: Simplify right side
    154,885.84x = 19,500,142,968.04
  5. Step 5: Solve for x
    x = 19,500,142,968.04/154,885.84
  6. Step 6: Final answer
    x = 125,900.10

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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.