Home / 212,192.28-318,428.64-99,904.61

Finding the Fourth Proportional to 212,192.28, 318,428.64 and 99,904.61

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Solution

The fourth proportional to 212,192.28, 318,428.64 and 99,904.61 is: 149,922.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,192.28 : 318,428.64 = 99,904.61 : x
  2. Step 2: Convert to fraction form
    212,192.28/318,428.64 = 99,904.61/x
  3. Step 3: Cross multiply
    212,192.28x = 318,428.64 × 99,904.61
  4. Step 4: Simplify right side
    212,192.28x = 31,812,489,888.10
  5. Step 5: Solve for x
    x = 31,812,489,888.10/212,192.28
  6. Step 6: Final answer
    x = 149,922.94

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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.