Home / 128,624.82-177,503.60-71,265.90

Finding the Fourth Proportional to 128,624.82, 177,503.60 and 71,265.90

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Solution

The fourth proportional to 128,624.82, 177,503.60 and 71,265.90 is: 98,347.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,624.82 : 177,503.60 = 71,265.90 : x
  2. Step 2: Convert to fraction form
    128,624.82/177,503.60 = 71,265.90/x
  3. Step 3: Cross multiply
    128,624.82x = 177,503.60 × 71,265.90
  4. Step 4: Simplify right side
    128,624.82x = 12,649,953,807.24
  5. Step 5: Solve for x
    x = 12,649,953,807.24/128,624.82
  6. Step 6: Final answer
    x = 98,347.69

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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.