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Finding the Fourth Proportional to 128,023.64, 176,672.75 and 71,435.01

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Solution

The fourth proportional to 128,023.64, 176,672.75 and 71,435.01 is: 98,580.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,023.64 : 176,672.75 = 71,435.01 : x
  2. Step 2: Convert to fraction form
    128,023.64/176,672.75 = 71,435.01/x
  3. Step 3: Cross multiply
    128,023.64x = 176,672.75 × 71,435.01
  4. Step 4: Simplify right side
    128,023.64x = 12,620,619,968.33
  5. Step 5: Solve for x
    x = 12,620,619,968.33/128,023.64
  6. Step 6: Final answer
    x = 98,580.39

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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.