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Finding the Fourth Proportional to 70,422.50, 97,191.22 and 40,212.20

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Solution

The fourth proportional to 70,422.50, 97,191.22 and 40,212.20 is: 55,497.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,422.50 : 97,191.22 = 40,212.20 : x
  2. Step 2: Convert to fraction form
    70,422.50/97,191.22 = 40,212.20/x
  3. Step 3: Cross multiply
    70,422.50x = 97,191.22 × 40,212.20
  4. Step 4: Simplify right side
    70,422.50x = 3,908,272,776.88
  5. Step 5: Solve for x
    x = 3,908,272,776.88/70,422.50
  6. Step 6: Final answer
    x = 55,497.50

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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.