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Finding the Fourth Proportional to 333,695.81, 500,539.50 and 80,978.38

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Solution

The fourth proportional to 333,695.81, 500,539.50 and 80,978.38 is: 121,466.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,695.81 : 500,539.50 = 80,978.38 : x
  2. Step 2: Convert to fraction form
    333,695.81/500,539.50 = 80,978.38/x
  3. Step 3: Cross multiply
    333,695.81x = 500,539.50 × 80,978.38
  4. Step 4: Simplify right side
    333,695.81x = 40,532,877,836.01
  5. Step 5: Solve for x
    x = 40,532,877,836.01/333,695.81
  6. Step 6: Final answer
    x = 121,466.55

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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.