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Finding the Fourth Proportional to 212,937.60, 319,665.60 and 107,702.40

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Solution

The fourth proportional to 212,937.60, 319,665.60 and 107,702.40 is: 161,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,937.60 : 319,665.60 = 107,702.40 : x
  2. Step 2: Convert to fraction form
    212,937.60/319,665.60 = 107,702.40/x
  3. Step 3: Cross multiply
    212,937.60x = 319,665.60 × 107,702.40
  4. Step 4: Simplify right side
    212,937.60x = 34,428,752,317.44
  5. Step 5: Solve for x
    x = 34,428,752,317.44/212,937.60
  6. Step 6: Final answer
    x = 161,684.70

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1.5x scale

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.