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Finding the Fourth Proportional to 154,028, 212,559.28 and 83,372

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Solution

The fourth proportional to 154,028, 212,559.28 and 83,372 is: 115,053.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,028 : 212,559.28 = 83,372 : x
  2. Step 2: Convert to fraction form
    154,028/212,559.28 = 83,372/x
  3. Step 3: Cross multiply
    154,028x = 212,559.28 × 83,372
  4. Step 4: Simplify right side
    154,028x = 17,721,492,292.16
  5. Step 5: Solve for x
    x = 17,721,492,292.16/154,028
  6. Step 6: Final answer
    x = 115,053.71

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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.