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Finding the Fourth Proportional to 289,941.04, 434,736.73 and 129,988

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Solution

The fourth proportional to 289,941.04, 434,736.73 and 129,988 is: 194,903.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,941.04 : 434,736.73 = 129,988 : x
  2. Step 2: Convert to fraction form
    289,941.04/434,736.73 = 129,988/x
  3. Step 3: Cross multiply
    289,941.04x = 434,736.73 × 129,988
  4. Step 4: Simplify right side
    289,941.04x = 56,510,558,059.24
  5. Step 5: Solve for x
    x = 56,510,558,059.24/289,941.04
  6. Step 6: Final answer
    x = 194,903.62

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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.