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Finding the Fourth Proportional to 78,861.84, 118,294.56 and 26,275.56

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Solution

The fourth proportional to 78,861.84, 118,294.56 and 26,275.56 is: 39,413.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,861.84 : 118,294.56 = 26,275.56 : x
  2. Step 2: Convert to fraction form
    78,861.84/118,294.56 = 26,275.56/x
  3. Step 3: Cross multiply
    78,861.84x = 118,294.56 × 26,275.56
  4. Step 4: Simplify right side
    78,861.84x = 3,108,255,808.95
  5. Step 5: Solve for x
    x = 3,108,255,808.95/78,861.84
  6. Step 6: Final answer
    x = 39,413.94

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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.