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Finding the Fourth Proportional to 91,776.30, 137,664.45 and 63,782.70

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Solution

The fourth proportional to 91,776.30, 137,664.45 and 63,782.70 is: 95,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,776.30 : 137,664.45 = 63,782.70 : x
  2. Step 2: Convert to fraction form
    91,776.30/137,664.45 = 63,782.70/x
  3. Step 3: Cross multiply
    91,776.30x = 137,664.45 × 63,782.70
  4. Step 4: Simplify right side
    91,776.30x = 8,780,610,315.02
  5. Step 5: Solve for x
    x = 8,780,610,315.02/91,776.30
  6. Step 6: Final answer
    x = 95,674.05

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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.