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Finding the Fourth Proportional to 81,069.76, 111,866.40 and 45,261.76

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Solution

The fourth proportional to 81,069.76, 111,866.40 and 45,261.76 is: 62,455.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,069.76 : 111,866.40 = 45,261.76 : x
  2. Step 2: Convert to fraction form
    81,069.76/111,866.40 = 45,261.76/x
  3. Step 3: Cross multiply
    81,069.76x = 111,866.40 × 45,261.76
  4. Step 4: Simplify right side
    81,069.76x = 5,063,270,148.86
  5. Step 5: Solve for x
    x = 5,063,270,148.86/81,069.76
  6. Step 6: Final answer
    x = 62,455.72

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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.