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Finding the Fourth Proportional to 229,392.45, 316,586.54 and 138,798.40

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Solution

The fourth proportional to 229,392.45, 316,586.54 and 138,798.40 is: 191,556.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,392.45 : 316,586.54 = 138,798.40 : x
  2. Step 2: Convert to fraction form
    229,392.45/316,586.54 = 138,798.40/x
  3. Step 3: Cross multiply
    229,392.45x = 316,586.54 × 138,798.40
  4. Step 4: Simplify right side
    229,392.45x = 43,941,705,213.54
  5. Step 5: Solve for x
    x = 43,941,705,213.54/229,392.45
  6. Step 6: Final answer
    x = 191,556.89

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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.