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Finding the Fourth Proportional to 70,730.81, 97,606.57 and 38,899.72

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Solution

The fourth proportional to 70,730.81, 97,606.57 and 38,899.72 is: 53,680.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,730.81 : 97,606.57 = 38,899.72 : x
  2. Step 2: Convert to fraction form
    70,730.81/97,606.57 = 38,899.72/x
  3. Step 3: Cross multiply
    70,730.81x = 97,606.57 × 38,899.72
  4. Step 4: Simplify right side
    70,730.81x = 3,796,868,243.16
  5. Step 5: Solve for x
    x = 3,796,868,243.16/70,730.81
  6. Step 6: Final answer
    x = 53,680.54

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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.