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Finding the Fourth Proportional to 212,219.30, 318,418.98 and 99,897.04

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Solution

The fourth proportional to 212,219.30, 318,418.98 and 99,897.04 is: 149,887.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,219.30 : 318,418.98 = 99,897.04 : x
  2. Step 2: Convert to fraction form
    212,219.30/318,418.98 = 99,897.04/x
  3. Step 3: Cross multiply
    212,219.30x = 318,418.98 × 99,897.04
  4. Step 4: Simplify right side
    212,219.30x = 31,809,112,411.16
  5. Step 5: Solve for x
    x = 31,809,112,411.16/212,219.30
  6. Step 6: Final answer
    x = 149,887.93

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.