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Finding the Fourth Proportional to 78,834.70, 118,215.60 and 34,438.60

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Solution

The fourth proportional to 78,834.70, 118,215.60 and 34,438.60 is: 51,641.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,834.70 : 118,215.60 = 34,438.60 : x
  2. Step 2: Convert to fraction form
    78,834.70/118,215.60 = 34,438.60/x
  3. Step 3: Cross multiply
    78,834.70x = 118,215.60 × 34,438.60
  4. Step 4: Simplify right side
    78,834.70x = 4,071,179,762.16
  5. Step 5: Solve for x
    x = 4,071,179,762.16/78,834.70
  6. Step 6: Final answer
    x = 51,641.98

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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.