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Finding the Fourth Proportional to 260,488.81, 390,779.69 and 92,106.90

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Solution

The fourth proportional to 260,488.81, 390,779.69 and 92,106.90 is: 138,176.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,488.81 : 390,779.69 = 92,106.90 : x
  2. Step 2: Convert to fraction form
    260,488.81/390,779.69 = 92,106.90/x
  3. Step 3: Cross multiply
    260,488.81x = 390,779.69 × 92,106.90
  4. Step 4: Simplify right side
    260,488.81x = 35,993,505,828.86
  5. Step 5: Solve for x
    x = 35,993,505,828.86/260,488.81
  6. Step 6: Final answer
    x = 138,176.78

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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.