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Finding the Fourth Proportional to 154,908.39, 213,773.01 and 86,925.21

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Solution

The fourth proportional to 154,908.39, 213,773.01 and 86,925.21 is: 119,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,908.39 : 213,773.01 = 86,925.21 : x
  2. Step 2: Convert to fraction form
    154,908.39/213,773.01 = 86,925.21/x
  3. Step 3: Cross multiply
    154,908.39x = 213,773.01 × 86,925.21
  4. Step 4: Simplify right side
    154,908.39x = 18,582,264,588.23
  5. Step 5: Solve for x
    x = 18,582,264,588.23/154,908.39
  6. Step 6: Final answer
    x = 119,956.47

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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.