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Finding the Fourth Proportional to 62,980.94, 86,907.27 and 38,778.07

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Solution

The fourth proportional to 62,980.94, 86,907.27 and 38,778.07 is: 53,509.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,980.94 : 86,907.27 = 38,778.07 : x
  2. Step 2: Convert to fraction form
    62,980.94/86,907.27 = 38,778.07/x
  3. Step 3: Cross multiply
    62,980.94x = 86,907.27 × 38,778.07
  4. Step 4: Simplify right side
    62,980.94x = 3,370,095,982.30
  5. Step 5: Solve for x
    x = 3,370,095,982.30/62,980.94
  6. Step 6: Final answer
    x = 53,509.77

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1.5x scale

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.