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Finding the Fourth Proportional to 128,581.50, 177,444.30 and 74,132.59

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Solution

The fourth proportional to 128,581.50, 177,444.30 and 74,132.59 is: 102,304.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,581.50 : 177,444.30 = 74,132.59 : x
  2. Step 2: Convert to fraction form
    128,581.50/177,444.30 = 74,132.59/x
  3. Step 3: Cross multiply
    128,581.50x = 177,444.30 × 74,132.59
  4. Step 4: Simplify right side
    128,581.50x = 13,154,405,544.67
  5. Step 5: Solve for x
    x = 13,154,405,544.67/128,581.50
  6. Step 6: Final answer
    x = 102,304.03

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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.