Home / 81,769.10-122,657.70-42,403.10

Finding the Fourth Proportional to 81,769.10, 122,657.70 and 42,403.10

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Solution

The fourth proportional to 81,769.10, 122,657.70 and 42,403.10 is: 63,606.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,769.10 : 122,657.70 = 42,403.10 : x
  2. Step 2: Convert to fraction form
    81,769.10/122,657.70 = 42,403.10/x
  3. Step 3: Cross multiply
    81,769.10x = 122,657.70 × 42,403.10
  4. Step 4: Simplify right side
    81,769.10x = 5,201,066,718.87
  5. Step 5: Solve for x
    x = 5,201,066,718.87/81,769.10
  6. Step 6: Final answer
    x = 63,606.75

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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.