Home / 128,828.37-177,793.47-71,473.35

Finding the Fourth Proportional to 128,828.37, 177,793.47 and 71,473.35

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Solution

The fourth proportional to 128,828.37, 177,793.47 and 71,473.35 is: 98,638.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,828.37 : 177,793.47 = 71,473.35 : x
  2. Step 2: Convert to fraction form
    128,828.37/177,793.47 = 71,473.35/x
  3. Step 3: Cross multiply
    128,828.37x = 177,793.47 × 71,473.35
  4. Step 4: Simplify right side
    128,828.37x = 12,707,494,909.02
  5. Step 5: Solve for x
    x = 12,707,494,909.02/128,828.37
  6. Step 6: Final answer
    x = 98,638.95

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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.