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Finding the Fourth Proportional to 289,057.70, 433,586.55 and 78,695.30

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Solution

The fourth proportional to 289,057.70, 433,586.55 and 78,695.30 is: 118,042.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,057.70 : 433,586.55 = 78,695.30 : x
  2. Step 2: Convert to fraction form
    289,057.70/433,586.55 = 78,695.30/x
  3. Step 3: Cross multiply
    289,057.70x = 433,586.55 × 78,695.30
  4. Step 4: Simplify right side
    289,057.70x = 34,121,223,628.22
  5. Step 5: Solve for x
    x = 34,121,223,628.22/289,057.70
  6. Step 6: Final answer
    x = 118,042.95

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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.