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Finding the Fourth Proportional to 91,621.88, 126,435.56 and 53,389.88

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Solution

The fourth proportional to 91,621.88, 126,435.56 and 53,389.88 is: 73,676.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,621.88 : 126,435.56 = 53,389.88 : x
  2. Step 2: Convert to fraction form
    91,621.88/126,435.56 = 53,389.88/x
  3. Step 3: Cross multiply
    91,621.88x = 126,435.56 × 53,389.88
  4. Step 4: Simplify right side
    91,621.88x = 6,750,379,376.13
  5. Step 5: Solve for x
    x = 6,750,379,376.13/91,621.88
  6. Step 6: Final answer
    x = 73,676.50

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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.