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Finding the Fourth Proportional to 70,804.05, 97,709.62 and 38,972.72

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Solution

The fourth proportional to 70,804.05, 97,709.62 and 38,972.72 is: 53,782.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,804.05 : 97,709.62 = 38,972.72 : x
  2. Step 2: Convert to fraction form
    70,804.05/97,709.62 = 38,972.72/x
  3. Step 3: Cross multiply
    70,804.05x = 97,709.62 × 38,972.72
  4. Step 4: Simplify right side
    70,804.05x = 3,808,009,466.70
  5. Step 5: Solve for x
    x = 3,808,009,466.70/70,804.05
  6. Step 6: Final answer
    x = 53,782.37

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1.5x scale

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.