Home / 81,821.68-122,632.08-42,356.32

Finding the Fourth Proportional to 81,821.68, 122,632.08 and 42,356.32

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Solution

The fourth proportional to 81,821.68, 122,632.08 and 42,356.32 is: 63,482.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,821.68 : 122,632.08 = 42,356.32 : x
  2. Step 2: Convert to fraction form
    81,821.68/122,632.08 = 42,356.32/x
  3. Step 3: Cross multiply
    81,821.68x = 122,632.08 × 42,356.32
  4. Step 4: Simplify right side
    81,821.68x = 5,194,243,622.75
  5. Step 5: Solve for x
    x = 5,194,243,622.75/81,821.68
  6. Step 6: Final answer
    x = 63,482.49

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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.