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Finding the Fourth Proportional to 70,020.20, 96,636.18 and 39,810.08

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Solution

The fourth proportional to 70,020.20, 96,636.18 and 39,810.08 is: 54,942.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,020.20 : 96,636.18 = 39,810.08 : x
  2. Step 2: Convert to fraction form
    70,020.20/96,636.18 = 39,810.08/x
  3. Step 3: Cross multiply
    70,020.20x = 96,636.18 × 39,810.08
  4. Step 4: Simplify right side
    70,020.20x = 3,847,094,056.69
  5. Step 5: Solve for x
    x = 3,847,094,056.69/70,020.20
  6. Step 6: Final answer
    x = 54,942.63

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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.