Home / 120,028.50-165,639.60-72,283.86

Finding the Fourth Proportional to 120,028.50, 165,639.60 and 72,283.86

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Solution

The fourth proportional to 120,028.50, 165,639.60 and 72,283.86 is: 99,751.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,028.50 : 165,639.60 = 72,283.86 : x
  2. Step 2: Convert to fraction form
    120,028.50/165,639.60 = 72,283.86/x
  3. Step 3: Cross multiply
    120,028.50x = 165,639.60 × 72,283.86
  4. Step 4: Simplify right side
    120,028.50x = 11,973,069,656.86
  5. Step 5: Solve for x
    x = 11,973,069,656.86/120,028.50
  6. Step 6: Final answer
    x = 99,751.89

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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.