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Finding the Fourth Proportional to 212,598, 318,911.58 and 70,443

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Solution

The fourth proportional to 212,598, 318,911.58 and 70,443 is: 105,669.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,598 : 318,911.58 = 70,443 : x
  2. Step 2: Convert to fraction form
    212,598/318,911.58 = 70,443/x
  3. Step 3: Cross multiply
    212,598x = 318,911.58 × 70,443
  4. Step 4: Simplify right side
    212,598x = 22,465,088,429.94
  5. Step 5: Solve for x
    x = 22,465,088,429.94/212,598
  6. Step 6: Final answer
    x = 105,669.33

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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.