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Finding the Fourth Proportional to 70,957.32, 97,920.88 and 39,126.72

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Solution

The fourth proportional to 70,957.32, 97,920.88 and 39,126.72 is: 53,994.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.32 : 97,920.88 = 39,126.72 : x
  2. Step 2: Convert to fraction form
    70,957.32/97,920.88 = 39,126.72/x
  3. Step 3: Cross multiply
    70,957.32x = 97,920.88 × 39,126.72
  4. Step 4: Simplify right side
    70,957.32x = 3,831,322,853.91
  5. Step 5: Solve for x
    x = 3,831,322,853.91/70,957.32
  6. Step 6: Final answer
    x = 53,994.75

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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.