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Finding the Fourth Proportional to 128,062.32, 176,742.72 and 71,485.44

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Solution

The fourth proportional to 128,062.32, 176,742.72 and 71,485.44 is: 98,659.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,062.32 : 176,742.72 = 71,485.44 : x
  2. Step 2: Convert to fraction form
    128,062.32/176,742.72 = 71,485.44/x
  3. Step 3: Cross multiply
    128,062.32x = 176,742.72 × 71,485.44
  4. Step 4: Simplify right side
    128,062.32x = 12,634,531,106.00
  5. Step 5: Solve for x
    x = 12,634,531,106.00/128,062.32
  6. Step 6: Final answer
    x = 98,659.24

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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.