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Finding the Fourth Proportional to 78,893.70, 118,340.55 and 37,421.70

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Solution

The fourth proportional to 78,893.70, 118,340.55 and 37,421.70 is: 56,132.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,893.70 : 118,340.55 = 37,421.70 : x
  2. Step 2: Convert to fraction form
    78,893.70/118,340.55 = 37,421.70/x
  3. Step 3: Cross multiply
    78,893.70x = 118,340.55 × 37,421.70
  4. Step 4: Simplify right side
    78,893.70x = 4,428,504,559.94
  5. Step 5: Solve for x
    x = 4,428,504,559.94/78,893.70
  6. Step 6: Final answer
    x = 56,132.55

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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.