Home / 128,834.04-177,757.20-74,372.88

Finding the Fourth Proportional to 128,834.04, 177,757.20 and 74,372.88

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Solution

The fourth proportional to 128,834.04, 177,757.20 and 74,372.88 is: 102,615.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,834.04 : 177,757.20 = 74,372.88 : x
  2. Step 2: Convert to fraction form
    128,834.04/177,757.20 = 74,372.88/x
  3. Step 3: Cross multiply
    128,834.04x = 177,757.20 × 74,372.88
  4. Step 4: Simplify right side
    128,834.04x = 13,220,314,904.74
  5. Step 5: Solve for x
    x = 13,220,314,904.74/128,834.04
  6. Step 6: Final answer
    x = 102,615.08

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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.