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Finding the Fourth Proportional to 207,963.30, 312,052.95 and 97,155.30

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Solution

The fourth proportional to 207,963.30, 312,052.95 and 97,155.30 is: 145,783.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,963.30 : 312,052.95 = 97,155.30 : x
  2. Step 2: Convert to fraction form
    207,963.30/312,052.95 = 97,155.30/x
  3. Step 3: Cross multiply
    207,963.30x = 312,052.95 × 97,155.30
  4. Step 4: Simplify right side
    207,963.30x = 30,317,597,973.14
  5. Step 5: Solve for x
    x = 30,317,597,973.14/207,963.30
  6. Step 6: Final answer
    x = 145,783.40

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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.