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Finding the Fourth Proportional to 212,868,015.40, 319,302,023.10 and 212,868,015.40

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Solution

The fourth proportional to 212,868,015.40, 319,302,023.10 and 212,868,015.40 is: 319,302,023.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,868,015.40 : 319,302,023.10 = 212,868,015.40 : x
  2. Step 2: Convert to fraction form
    212,868,015.40/319,302,023.10 = 212,868,015.40/x
  3. Step 3: Cross multiply
    212,868,015.40x = 319,302,023.10 × 212,868,015.40
  4. Step 4: Simplify right side
    212,868,015.40x = 67,969,187,970,501,960
  5. Step 5: Solve for x
    x = 67,969,187,970,501,960/212,868,015.40
  6. Step 6: Final answer
    x = 319,302,023.10

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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.