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Finding the Fourth Proportional to 128,601.60, 177,441.44 and 77,622.64

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Solution

The fourth proportional to 128,601.60, 177,441.44 and 77,622.64 is: 107,101.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,601.60 : 177,441.44 = 77,622.64 : x
  2. Step 2: Convert to fraction form
    128,601.60/177,441.44 = 77,622.64/x
  3. Step 3: Cross multiply
    128,601.60x = 177,441.44 × 77,622.64
  4. Step 4: Simplify right side
    128,601.60x = 13,773,473,018.20
  5. Step 5: Solve for x
    x = 13,773,473,018.20/128,601.60
  6. Step 6: Final answer
    x = 107,101.88

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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.