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Finding the Fourth Proportional to 91,486.80, 137,316.60 and 56,494.80

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Solution

The fourth proportional to 91,486.80, 137,316.60 and 56,494.80 is: 84,795.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,486.80 : 137,316.60 = 56,494.80 : x
  2. Step 2: Convert to fraction form
    91,486.80/137,316.60 = 56,494.80/x
  3. Step 3: Cross multiply
    91,486.80x = 137,316.60 × 56,494.80
  4. Step 4: Simplify right side
    91,486.80x = 7,757,673,853.68
  5. Step 5: Solve for x
    x = 7,757,673,853.68/91,486.80
  6. Step 6: Final answer
    x = 84,795.55

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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.