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Finding the Fourth Proportional to 145,616.94, 218,462.94 and 79,039.80

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Solution

The fourth proportional to 145,616.94, 218,462.94 and 79,039.80 is: 118,580.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,616.94 : 218,462.94 = 79,039.80 : x
  2. Step 2: Convert to fraction form
    145,616.94/218,462.94 = 79,039.80/x
  3. Step 3: Cross multiply
    145,616.94x = 218,462.94 × 79,039.80
  4. Step 4: Simplify right side
    145,616.94x = 17,267,267,085.01
  5. Step 5: Solve for x
    x = 17,267,267,085.01/145,616.94
  6. Step 6: Final answer
    x = 118,580.07

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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.