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Finding the Fourth Proportional to 78,367.52, 117,565.84 and 25,779.04

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Solution

The fourth proportional to 78,367.52, 117,565.84 and 25,779.04 is: 38,673.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,367.52 : 117,565.84 = 25,779.04 : x
  2. Step 2: Convert to fraction form
    78,367.52/117,565.84 = 25,779.04/x
  3. Step 3: Cross multiply
    78,367.52x = 117,565.84 × 25,779.04
  4. Step 4: Simplify right side
    78,367.52x = 3,030,734,491.99
  5. Step 5: Solve for x
    x = 3,030,734,491.99/78,367.52
  6. Step 6: Final answer
    x = 38,673.35

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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.