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Finding the Fourth Proportional to 212,481.88, 318,746.17 and 70,275.36

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Solution

The fourth proportional to 212,481.88, 318,746.17 and 70,275.36 is: 105,420.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,481.88 : 318,746.17 = 70,275.36 : x
  2. Step 2: Convert to fraction form
    212,481.88/318,746.17 = 70,275.36/x
  3. Step 3: Cross multiply
    212,481.88x = 318,746.17 × 70,275.36
  4. Step 4: Simplify right side
    212,481.88x = 22,400,001,224.19
  5. Step 5: Solve for x
    x = 22,400,001,224.19/212,481.88
  6. Step 6: Final answer
    x = 105,420.76

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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.