Home / 212,605,821.20-318,908,731.80-115,607,997.20

Finding the Fourth Proportional to 212,605,821.20, 318,908,731.80 and 115,607,997.20

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Solution

The fourth proportional to 212,605,821.20, 318,908,731.80 and 115,607,997.20 is: 173,411,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,605,821.20 : 318,908,731.80 = 115,607,997.20 : x
  2. Step 2: Convert to fraction form
    212,605,821.20/318,908,731.80 = 115,607,997.20/x
  3. Step 3: Cross multiply
    212,605,821.20x = 318,908,731.80 × 115,607,997.20
  4. Step 4: Simplify right side
    212,605,821.20x = 36,868,399,772,989,952
  5. Step 5: Solve for x
    x = 36,868,399,772,989,952/212,605,821.20
  6. Step 6: Final answer
    x = 173,411,995.80

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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.