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Finding the Fourth Proportional to 154,356.48, 212,922.72 and 90,681.12

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Solution

The fourth proportional to 154,356.48, 212,922.72 and 90,681.12 is: 125,087.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,356.48 : 212,922.72 = 90,681.12 : x
  2. Step 2: Convert to fraction form
    154,356.48/212,922.72 = 90,681.12/x
  3. Step 3: Cross multiply
    154,356.48x = 212,922.72 × 90,681.12
  4. Step 4: Simplify right side
    154,356.48x = 19,308,070,723.05
  5. Step 5: Solve for x
    x = 19,308,070,723.05/154,356.48
  6. Step 6: Final answer
    x = 125,087.53

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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.