Home / 212,569,705.80-318,929,208.30-91,438,288.20

Finding the Fourth Proportional to 212,569,705.80, 318,929,208.30 and 91,438,288.20

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Solution

The fourth proportional to 212,569,705.80, 318,929,208.30 and 91,438,288.20 is: 137,189,543.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,569,705.80 : 318,929,208.30 = 91,438,288.20 : x
  2. Step 2: Convert to fraction form
    212,569,705.80/318,929,208.30 = 91,438,288.20/x
  3. Step 3: Cross multiply
    212,569,705.80x = 318,929,208.30 × 91,438,288.20
  4. Step 4: Simplify right side
    212,569,705.80x = 29,162,340,863,933,236
  5. Step 5: Solve for x
    x = 29,162,340,863,933,236/212,569,705.80
  6. Step 6: Final answer
    x = 137,189,543.33

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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.