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Finding the Fourth Proportional to 97,678.72, 134,754 and 57,321.28

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Solution

The fourth proportional to 97,678.72, 134,754 and 57,321.28 is: 79,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,678.72 : 134,754 = 57,321.28 : x
  2. Step 2: Convert to fraction form
    97,678.72/134,754 = 57,321.28/x
  3. Step 3: Cross multiply
    97,678.72x = 134,754 × 57,321.28
  4. Step 4: Simplify right side
    97,678.72x = 7,724,271,765.12
  5. Step 5: Solve for x
    x = 7,724,271,765.12/97,678.72
  6. Step 6: Final answer
    x = 79,078.35

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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.