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Finding the Fourth Proportional to 289,765.71, 434,643.90 and 79,403.64

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Solution

The fourth proportional to 289,765.71, 434,643.90 and 79,403.64 is: 119,104.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,765.71 : 434,643.90 = 79,403.64 : x
  2. Step 2: Convert to fraction form
    289,765.71/434,643.90 = 79,403.64/x
  3. Step 3: Cross multiply
    289,765.71x = 434,643.90 × 79,403.64
  4. Step 4: Simplify right side
    289,765.71x = 34,512,307,763.80
  5. Step 5: Solve for x
    x = 34,512,307,763.80/289,765.71
  6. Step 6: Final answer
    x = 119,104.18

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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.