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Finding the Fourth Proportional to 78,722.99, 118,041.15 and 53,791.19

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Solution

The fourth proportional to 78,722.99, 118,041.15 and 53,791.19 is: 80,657.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,722.99 : 118,041.15 = 53,791.19 : x
  2. Step 2: Convert to fraction form
    78,722.99/118,041.15 = 53,791.19/x
  3. Step 3: Cross multiply
    78,722.99x = 118,041.15 × 53,791.19
  4. Step 4: Simplify right side
    78,722.99x = 6,349,573,927.47
  5. Step 5: Solve for x
    x = 6,349,573,927.47/78,722.99
  6. Step 6: Final answer
    x = 80,657.17

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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.