Home / 78,711.48-118,045.56-21,771.75

Finding the Fourth Proportional to 78,711.48, 118,045.56 and 21,771.75

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Solution

The fourth proportional to 78,711.48, 118,045.56 and 21,771.75 is: 32,651.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,711.48 : 118,045.56 = 21,771.75 : x
  2. Step 2: Convert to fraction form
    78,711.48/118,045.56 = 21,771.75/x
  3. Step 3: Cross multiply
    78,711.48x = 118,045.56 × 21,771.75
  4. Step 4: Simplify right side
    78,711.48x = 2,570,057,888.00
  5. Step 5: Solve for x
    x = 2,570,057,888.00/78,711.48
  6. Step 6: Final answer
    x = 32,651.63

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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.