Home / 99,664.20-137,531.64-56,638.08

Finding the Fourth Proportional to 99,664.20, 137,531.64 and 56,638.08

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Solution

The fourth proportional to 99,664.20, 137,531.64 and 56,638.08 is: 78,157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,664.20 : 137,531.64 = 56,638.08 : x
  2. Step 2: Convert to fraction form
    99,664.20/137,531.64 = 56,638.08/x
  3. Step 3: Cross multiply
    99,664.20x = 137,531.64 × 56,638.08
  4. Step 4: Simplify right side
    99,664.20x = 7,789,528,028.85
  5. Step 5: Solve for x
    x = 7,789,528,028.85/99,664.20
  6. Step 6: Final answer
    x = 78,157.73

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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.