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Finding the Fourth Proportional to 90,975.86, 136,437.87 and 57,645.62

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Solution

The fourth proportional to 90,975.86, 136,437.87 and 57,645.62 is: 86,452.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,975.86 : 136,437.87 = 57,645.62 : x
  2. Step 2: Convert to fraction form
    90,975.86/136,437.87 = 57,645.62/x
  3. Step 3: Cross multiply
    90,975.86x = 136,437.87 × 57,645.62
  4. Step 4: Simplify right side
    90,975.86x = 7,865,045,607.63
  5. Step 5: Solve for x
    x = 7,865,045,607.63/90,975.86
  6. Step 6: Final answer
    x = 86,452.01

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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.