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Finding the Fourth Proportional to 62,981.94, 86,908.65 and 38,779.07

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Solution

The fourth proportional to 62,981.94, 86,908.65 and 38,779.07 is: 53,511.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,981.94 : 86,908.65 = 38,779.07 : x
  2. Step 2: Convert to fraction form
    62,981.94/86,908.65 = 38,779.07/x
  3. Step 3: Cross multiply
    62,981.94x = 86,908.65 × 38,779.07
  4. Step 4: Simplify right side
    62,981.94x = 3,370,236,621.96
  5. Step 5: Solve for x
    x = 3,370,236,621.96/62,981.94
  6. Step 6: Final answer
    x = 53,511.16

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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.