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Finding the Fourth Proportional to 212,374.58, 318,611.18 and 70,211.28

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Solution

The fourth proportional to 212,374.58, 318,611.18 and 70,211.28 is: 105,333.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,374.58 : 318,611.18 = 70,211.28 : x
  2. Step 2: Convert to fraction form
    212,374.58/318,611.18 = 70,211.28/x
  3. Step 3: Cross multiply
    212,374.58x = 318,611.18 × 70,211.28
  4. Step 4: Simplify right side
    212,374.58x = 22,370,098,084.95
  5. Step 5: Solve for x
    x = 22,370,098,084.95/212,374.58
  6. Step 6: Final answer
    x = 105,333.22

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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.