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Finding the Fourth Proportional to 212,483.10, 318,748.02 and 70,276.56

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Solution

The fourth proportional to 212,483.10, 318,748.02 and 70,276.56 is: 105,422.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,483.10 : 318,748.02 = 70,276.56 : x
  2. Step 2: Convert to fraction form
    212,483.10/318,748.02 = 70,276.56/x
  3. Step 3: Cross multiply
    212,483.10x = 318,748.02 × 70,276.56
  4. Step 4: Simplify right side
    212,483.10x = 22,400,514,352.41
  5. Step 5: Solve for x
    x = 22,400,514,352.41/212,483.10
  6. Step 6: Final answer
    x = 105,422.57

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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.