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Finding the Fourth Proportional to 70,928.76, 97,886.70 and 40,719

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Solution

The fourth proportional to 70,928.76, 97,886.70 and 40,719 is: 56,195.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,928.76 : 97,886.70 = 40,719 : x
  2. Step 2: Convert to fraction form
    70,928.76/97,886.70 = 40,719/x
  3. Step 3: Cross multiply
    70,928.76x = 97,886.70 × 40,719
  4. Step 4: Simplify right side
    70,928.76x = 3,985,848,537.30
  5. Step 5: Solve for x
    x = 3,985,848,537.30/70,928.76
  6. Step 6: Final answer
    x = 56,195.10

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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.