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Finding the Fourth Proportional to 100,527.87, 138,739.53 and 57,511.35

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Solution

The fourth proportional to 100,527.87, 138,739.53 and 57,511.35 is: 79,372.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,527.87 : 138,739.53 = 57,511.35 : x
  2. Step 2: Convert to fraction form
    100,527.87/138,739.53 = 57,511.35/x
  3. Step 3: Cross multiply
    100,527.87x = 138,739.53 × 57,511.35
  4. Step 4: Simplify right side
    100,527.87x = 7,979,097,381.11
  5. Step 5: Solve for x
    x = 7,979,097,381.11/100,527.87
  6. Step 6: Final answer
    x = 79,372.00

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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.