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Finding the Fourth Proportional to 212,346, 318,646.19 and 79,319.75

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Solution

The fourth proportional to 212,346, 318,646.19 and 79,319.75 is: 119,027.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,346 : 318,646.19 = 79,319.75 : x
  2. Step 2: Convert to fraction form
    212,346/318,646.19 = 79,319.75/x
  3. Step 3: Cross multiply
    212,346x = 318,646.19 × 79,319.75
  4. Step 4: Simplify right side
    212,346x = 25,274,934,734.32
  5. Step 5: Solve for x
    x = 25,274,934,734.32/212,346
  6. Step 6: Final answer
    x = 119,027.13

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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.