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Finding the Fourth Proportional to 72,880.80, 109,300.08 and 30,770.26

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Solution

The fourth proportional to 72,880.80, 109,300.08 and 30,770.26 is: 46,146.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,880.80 : 109,300.08 = 30,770.26 : x
  2. Step 2: Convert to fraction form
    72,880.80/109,300.08 = 30,770.26/x
  3. Step 3: Cross multiply
    72,880.80x = 109,300.08 × 30,770.26
  4. Step 4: Simplify right side
    72,880.80x = 3,363,191,879.62
  5. Step 5: Solve for x
    x = 3,363,191,879.62/72,880.80
  6. Step 6: Final answer
    x = 46,146.47

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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.