Home / 128,903.15-177,883.67-71,539.14

Finding the Fourth Proportional to 128,903.15, 177,883.67 and 71,539.14

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Solution

The fourth proportional to 128,903.15, 177,883.67 and 71,539.14 is: 98,722.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,903.15 : 177,883.67 = 71,539.14 : x
  2. Step 2: Convert to fraction form
    128,903.15/177,883.67 = 71,539.14/x
  3. Step 3: Cross multiply
    128,903.15x = 177,883.67 × 71,539.14
  4. Step 4: Simplify right side
    128,903.15x = 12,725,644,771.84
  5. Step 5: Solve for x
    x = 12,725,644,771.84/128,903.15
  6. Step 6: Final answer
    x = 98,722.53

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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.