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Finding the Fourth Proportional to 128,585.45, 177,446.04 and 71,224.58

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Solution

The fourth proportional to 128,585.45, 177,446.04 and 71,224.58 is: 98,288.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,585.45 : 177,446.04 = 71,224.58 : x
  2. Step 2: Convert to fraction form
    128,585.45/177,446.04 = 71,224.58/x
  3. Step 3: Cross multiply
    128,585.45x = 177,446.04 × 71,224.58
  4. Step 4: Simplify right side
    128,585.45x = 12,638,520,061.67
  5. Step 5: Solve for x
    x = 12,638,520,061.67/128,585.45
  6. Step 6: Final answer
    x = 98,288.88

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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.