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Finding the Fourth Proportional to 49,210.80, 73,825.80 and 21,130.80

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Solution

The fourth proportional to 49,210.80, 73,825.80 and 21,130.80 is: 31,700.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,210.80 : 73,825.80 = 21,130.80 : x
  2. Step 2: Convert to fraction form
    49,210.80/73,825.80 = 21,130.80/x
  3. Step 3: Cross multiply
    49,210.80x = 73,825.80 × 21,130.80
  4. Step 4: Simplify right side
    49,210.80x = 1,559,998,214.64
  5. Step 5: Solve for x
    x = 1,559,998,214.64/49,210.80
  6. Step 6: Final answer
    x = 31,700.32

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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.