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Finding the Fourth Proportional to 78,860.99, 118,227.67 and 53,838.11

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Solution

The fourth proportional to 78,860.99, 118,227.67 and 53,838.11 is: 80,713.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,860.99 : 118,227.67 = 53,838.11 : x
  2. Step 2: Convert to fraction form
    78,860.99/118,227.67 = 53,838.11/x
  3. Step 3: Cross multiply
    78,860.99x = 118,227.67 × 53,838.11
  4. Step 4: Simplify right side
    78,860.99x = 6,365,154,302.50
  5. Step 5: Solve for x
    x = 6,365,154,302.50/78,860.99
  6. Step 6: Final answer
    x = 80,713.60

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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.