Home / 128,651.04-177,535.77-71,289.86

Finding the Fourth Proportional to 128,651.04, 177,535.77 and 71,289.86

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Solution

The fourth proportional to 128,651.04, 177,535.77 and 71,289.86 is: 98,378.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,651.04 : 177,535.77 = 71,289.86 : x
  2. Step 2: Convert to fraction form
    128,651.04/177,535.77 = 71,289.86/x
  3. Step 3: Cross multiply
    128,651.04x = 177,535.77 × 71,289.86
  4. Step 4: Simplify right side
    128,651.04x = 12,656,500,188.29
  5. Step 5: Solve for x
    x = 12,656,500,188.29/128,651.04
  6. Step 6: Final answer
    x = 98,378.53

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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.