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Finding the Fourth Proportional to 315,376.08, 435,215.82 and 172,134.84

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Solution

The fourth proportional to 315,376.08, 435,215.82 and 172,134.84 is: 237,544.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,376.08 : 435,215.82 = 172,134.84 : x
  2. Step 2: Convert to fraction form
    315,376.08/435,215.82 = 172,134.84/x
  3. Step 3: Cross multiply
    315,376.08x = 435,215.82 × 172,134.84
  4. Step 4: Simplify right side
    315,376.08x = 74,915,805,541.17
  5. Step 5: Solve for x
    x = 74,915,805,541.17/315,376.08
  6. Step 6: Final answer
    x = 237,544.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.