Home / 81,802.08-122,768.75-42,370.47

Finding the Fourth Proportional to 81,802.08, 122,768.75 and 42,370.47

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Solution

The fourth proportional to 81,802.08, 122,768.75 and 42,370.47 is: 63,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,802.08 : 122,768.75 = 42,370.47 : x
  2. Step 2: Convert to fraction form
    81,802.08/122,768.75 = 42,370.47/x
  3. Step 3: Cross multiply
    81,802.08x = 122,768.75 × 42,370.47
  4. Step 4: Simplify right side
    81,802.08x = 5,201,769,426.96
  5. Step 5: Solve for x
    x = 5,201,769,426.96/81,802.08
  6. Step 6: Final answer
    x = 63,589.70

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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.