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Finding the Fourth Proportional to 30,325.80, 42,543.60 and 30,325.80

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Solution

The fourth proportional to 30,325.80, 42,543.60 and 30,325.80 is: 42,543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,325.80 : 42,543.60 = 30,325.80 : x
  2. Step 2: Convert to fraction form
    30,325.80/42,543.60 = 30,325.80/x
  3. Step 3: Cross multiply
    30,325.80x = 42,543.60 × 30,325.80
  4. Step 4: Simplify right side
    30,325.80x = 1,290,168,704.88
  5. Step 5: Solve for x
    x = 1,290,168,704.88/30,325.80
  6. Step 6: Final answer
    x = 42,543.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.