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Finding the Fourth Proportional to 105,314.88, 145,431.60 and 67,654.80

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Solution

The fourth proportional to 105,314.88, 145,431.60 and 67,654.80 is: 93,425.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,314.88 : 145,431.60 = 67,654.80 : x
  2. Step 2: Convert to fraction form
    105,314.88/145,431.60 = 67,654.80/x
  3. Step 3: Cross multiply
    105,314.88x = 145,431.60 × 67,654.80
  4. Step 4: Simplify right side
    105,314.88x = 9,839,145,811.68
  5. Step 5: Solve for x
    x = 9,839,145,811.68/105,314.88
  6. Step 6: Final answer
    x = 93,425.98

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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.