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Finding the Fourth Proportional to 212,163.48, 318,066.48 and 92,130.12

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Solution

The fourth proportional to 212,163.48, 318,066.48 and 92,130.12 is: 138,117.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,163.48 : 318,066.48 = 92,130.12 : x
  2. Step 2: Convert to fraction form
    212,163.48/318,066.48 = 92,130.12/x
  3. Step 3: Cross multiply
    212,163.48x = 318,066.48 × 92,130.12
  4. Step 4: Simplify right side
    212,163.48x = 29,303,502,970.38
  5. Step 5: Solve for x
    x = 29,303,502,970.38/212,163.48
  6. Step 6: Final answer
    x = 138,117.56

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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.