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Finding the Fourth Proportional to 81,278.58, 112,159.92 and 45,461.67

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Solution

The fourth proportional to 81,278.58, 112,159.92 and 45,461.67 is: 62,734.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.58 : 112,159.92 = 45,461.67 : x
  2. Step 2: Convert to fraction form
    81,278.58/112,159.92 = 45,461.67/x
  3. Step 3: Cross multiply
    81,278.58x = 112,159.92 × 45,461.67
  4. Step 4: Simplify right side
    81,278.58x = 5,098,977,270.27
  5. Step 5: Solve for x
    x = 5,098,977,270.27/81,278.58
  6. Step 6: Final answer
    x = 62,734.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.