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Finding the Fourth Proportional to 78,845.40, 118,303.20 and 41,396.40

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Solution

The fourth proportional to 78,845.40, 118,303.20 and 41,396.40 is: 62,113.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,845.40 : 118,303.20 = 41,396.40 : x
  2. Step 2: Convert to fraction form
    78,845.40/118,303.20 = 41,396.40/x
  3. Step 3: Cross multiply
    78,845.40x = 118,303.20 × 41,396.40
  4. Step 4: Simplify right side
    78,845.40x = 4,897,326,588.48
  5. Step 5: Solve for x
    x = 4,897,326,588.48/78,845.40
  6. Step 6: Final answer
    x = 62,113.03

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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.