Home / 212,813,115.20-319,219,672.80-115,731,310.40

Finding the Fourth Proportional to 212,813,115.20, 319,219,672.80 and 115,731,310.40

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Solution

The fourth proportional to 212,813,115.20, 319,219,672.80 and 115,731,310.40 is: 173,596,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,813,115.20 : 319,219,672.80 = 115,731,310.40 : x
  2. Step 2: Convert to fraction form
    212,813,115.20/319,219,672.80 = 115,731,310.40/x
  3. Step 3: Cross multiply
    212,813,115.20x = 319,219,672.80 × 115,731,310.40
  4. Step 4: Simplify right side
    212,813,115.20x = 36,943,711,038,603,240
  5. Step 5: Solve for x
    x = 36,943,711,038,603,240/212,813,115.20
  6. Step 6: Final answer
    x = 173,596,965.60

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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.