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Finding the Fourth Proportional to 70,597.50, 105,906.12 and 20,681.22

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Solution

The fourth proportional to 70,597.50, 105,906.12 and 20,681.22 is: 31,024.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,597.50 : 105,906.12 = 20,681.22 : x
  2. Step 2: Convert to fraction form
    70,597.50/105,906.12 = 20,681.22/x
  3. Step 3: Cross multiply
    70,597.50x = 105,906.12 × 20,681.22
  4. Step 4: Simplify right side
    70,597.50x = 2,190,267,767.07
  5. Step 5: Solve for x
    x = 2,190,267,767.07/70,597.50
  6. Step 6: Final answer
    x = 31,024.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.