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Finding the Fourth Proportional to 70,706.64, 97,561.16 and 39,662.87

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Solution

The fourth proportional to 70,706.64, 97,561.16 and 39,662.87 is: 54,726.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,706.64 : 97,561.16 = 39,662.87 : x
  2. Step 2: Convert to fraction form
    70,706.64/97,561.16 = 39,662.87/x
  3. Step 3: Cross multiply
    70,706.64x = 97,561.16 × 39,662.87
  4. Step 4: Simplify right side
    70,706.64x = 3,869,555,606.13
  5. Step 5: Solve for x
    x = 3,869,555,606.13/70,706.64
  6. Step 6: Final answer
    x = 54,726.91

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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.