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Finding the Fourth Proportional to 212,490.35, 318,710.31 and 70,335.96

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Solution

The fourth proportional to 212,490.35, 318,710.31 and 70,335.96 is: 105,495.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,490.35 : 318,710.31 = 70,335.96 : x
  2. Step 2: Convert to fraction form
    212,490.35/318,710.31 = 70,335.96/x
  3. Step 3: Cross multiply
    212,490.35x = 318,710.31 × 70,335.96
  4. Step 4: Simplify right side
    212,490.35x = 22,416,794,156.82
  5. Step 5: Solve for x
    x = 22,416,794,156.82/212,490.35
  6. Step 6: Final answer
    x = 105,495.59

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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.