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Finding the Fourth Proportional to 105,336.87, 145,364.87 and 57,590.20

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Solution

The fourth proportional to 105,336.87, 145,364.87 and 57,590.20 is: 79,474.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,336.87 : 145,364.87 = 57,590.20 : x
  2. Step 2: Convert to fraction form
    105,336.87/145,364.87 = 57,590.20/x
  3. Step 3: Cross multiply
    105,336.87x = 145,364.87 × 57,590.20
  4. Step 4: Simplify right side
    105,336.87x = 8,371,591,936.27
  5. Step 5: Solve for x
    x = 8,371,591,936.27/105,336.87
  6. Step 6: Final answer
    x = 79,474.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.