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Finding the Fourth Proportional to 415,354.95, 623,078.87 and 131,085.95

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Solution

The fourth proportional to 415,354.95, 623,078.87 and 131,085.95 is: 196,643.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,354.95 : 623,078.87 = 131,085.95 : x
  2. Step 2: Convert to fraction form
    415,354.95/623,078.87 = 131,085.95/x
  3. Step 3: Cross multiply
    415,354.95x = 623,078.87 × 131,085.95
  4. Step 4: Simplify right side
    415,354.95x = 81,676,881,828.05
  5. Step 5: Solve for x
    x = 81,676,881,828.05/415,354.95
  6. Step 6: Final answer
    x = 196,643.57

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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.