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Finding the Fourth Proportional to 70,322.07, 105,461.09 and 20,405.62

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Solution

The fourth proportional to 70,322.07, 105,461.09 and 20,405.62 is: 30,602.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,322.07 : 105,461.09 = 20,405.62 : x
  2. Step 2: Convert to fraction form
    70,322.07/105,461.09 = 20,405.62/x
  3. Step 3: Cross multiply
    70,322.07x = 105,461.09 × 20,405.62
  4. Step 4: Simplify right side
    70,322.07x = 2,151,999,033.65
  5. Step 5: Solve for x
    x = 2,151,999,033.65/70,322.07
  6. Step 6: Final answer
    x = 30,602.04

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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.