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Finding the Fourth Proportional to 128,147.56, 176,853.54 and 74,449.96

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Solution

The fourth proportional to 128,147.56, 176,853.54 and 74,449.96 is: 102,746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,147.56 : 176,853.54 = 74,449.96 : x
  2. Step 2: Convert to fraction form
    128,147.56/176,853.54 = 74,449.96/x
  3. Step 3: Cross multiply
    128,147.56x = 176,853.54 × 74,449.96
  4. Step 4: Simplify right side
    128,147.56x = 13,166,738,978.86
  5. Step 5: Solve for x
    x = 13,166,738,978.86/128,147.56
  6. Step 6: Final answer
    x = 102,746.70

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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.