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Finding the Fourth Proportional to 70,956.63, 97,920.81 and 39,126.66

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Solution

The fourth proportional to 70,956.63, 97,920.81 and 39,126.66 is: 53,995.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956.63 : 97,920.81 = 39,126.66 : x
  2. Step 2: Convert to fraction form
    70,956.63/97,920.81 = 39,126.66/x
  3. Step 3: Cross multiply
    70,956.63x = 97,920.81 × 39,126.66
  4. Step 4: Simplify right side
    70,956.63x = 3,831,314,239.79
  5. Step 5: Solve for x
    x = 3,831,314,239.79/70,956.63
  6. Step 6: Final answer
    x = 53,995.16

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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.