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Finding the Fourth Proportional to 45,392.04, 68,030.40 and 20,405.40

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Solution

The fourth proportional to 45,392.04, 68,030.40 and 20,405.40 is: 30,582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,392.04 : 68,030.40 = 20,405.40 : x
  2. Step 2: Convert to fraction form
    45,392.04/68,030.40 = 20,405.40/x
  3. Step 3: Cross multiply
    45,392.04x = 68,030.40 × 20,405.40
  4. Step 4: Simplify right side
    45,392.04x = 1,388,187,524.16
  5. Step 5: Solve for x
    x = 1,388,187,524.16/45,392.04
  6. Step 6: Final answer
    x = 30,582.18

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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.