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Finding the Fourth Proportional to 70,431.96, 97,191.18 and 40,218.96

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Solution

The fourth proportional to 70,431.96, 97,191.18 and 40,218.96 is: 55,499.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,431.96 : 97,191.18 = 40,218.96 : x
  2. Step 2: Convert to fraction form
    70,431.96/97,191.18 = 40,218.96/x
  3. Step 3: Cross multiply
    70,431.96x = 97,191.18 × 40,218.96
  4. Step 4: Simplify right side
    70,431.96x = 3,908,928,180.77
  5. Step 5: Solve for x
    x = 3,908,928,180.77/70,431.96
  6. Step 6: Final answer
    x = 55,499.35

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1.5x scale

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.