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Finding the Fourth Proportional to 260,043.59, 390,078.75 and 73,069.67

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Solution

The fourth proportional to 260,043.59, 390,078.75 and 73,069.67 is: 109,608.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,043.59 : 390,078.75 = 73,069.67 : x
  2. Step 2: Convert to fraction form
    260,043.59/390,078.75 = 73,069.67/x
  3. Step 3: Cross multiply
    260,043.59x = 390,078.75 × 73,069.67
  4. Step 4: Simplify right side
    260,043.59x = 28,502,925,536.51
  5. Step 5: Solve for x
    x = 28,502,925,536.51/260,043.59
  6. Step 6: Final answer
    x = 109,608.26

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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.