Home / 128,853.75-177,818.19-72,283.35

Finding the Fourth Proportional to 128,853.75, 177,818.19 and 72,283.35

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Solution

The fourth proportional to 128,853.75, 177,818.19 and 72,283.35 is: 99,751.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.75 : 177,818.19 = 72,283.35 : x
  2. Step 2: Convert to fraction form
    128,853.75/177,818.19 = 72,283.35/x
  3. Step 3: Cross multiply
    128,853.75x = 177,818.19 × 72,283.35
  4. Step 4: Simplify right side
    128,853.75x = 12,853,294,464.14
  5. Step 5: Solve for x
    x = 12,853,294,464.14/128,853.75
  6. Step 6: Final answer
    x = 99,751.03

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1.5x scale

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.