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Finding the Fourth Proportional to 209,687.40, 314,822.70 and 130,955.40

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Solution

The fourth proportional to 209,687.40, 314,822.70 and 130,955.40 is: 196,615.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,687.40 : 314,822.70 = 130,955.40 : x
  2. Step 2: Convert to fraction form
    209,687.40/314,822.70 = 130,955.40/x
  3. Step 3: Cross multiply
    209,687.40x = 314,822.70 × 130,955.40
  4. Step 4: Simplify right side
    209,687.40x = 41,227,732,607.58
  5. Step 5: Solve for x
    x = 41,227,732,607.58/209,687.40
  6. Step 6: Final answer
    x = 196,615.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.