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Finding the Fourth Proportional to 208,339.16, 312,523.32 and 103,129.88

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Solution

The fourth proportional to 208,339.16, 312,523.32 and 103,129.88 is: 154,702.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,339.16 : 312,523.32 = 103,129.88 : x
  2. Step 2: Convert to fraction form
    208,339.16/312,523.32 = 103,129.88/x
  3. Step 3: Cross multiply
    208,339.16x = 312,523.32 × 103,129.88
  4. Step 4: Simplify right side
    208,339.16x = 32,230,492,488.80
  5. Step 5: Solve for x
    x = 32,230,492,488.80/208,339.16
  6. Step 6: Final answer
    x = 154,702.04

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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.