Home / 128,922.75-177,914.61-72,335.34

Finding the Fourth Proportional to 128,922.75, 177,914.61 and 72,335.34

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Solution

The fourth proportional to 128,922.75, 177,914.61 and 72,335.34 is: 99,823.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.75 : 177,914.61 = 72,335.34 : x
  2. Step 2: Convert to fraction form
    128,922.75/177,914.61 = 72,335.34/x
  3. Step 3: Cross multiply
    128,922.75x = 177,914.61 × 72,335.34
  4. Step 4: Simplify right side
    128,922.75x = 12,869,513,805.32
  5. Step 5: Solve for x
    x = 12,869,513,805.32/128,922.75
  6. Step 6: Final answer
    x = 99,823.45

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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.