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Finding the Fourth Proportional to 128,214.96, 176,937.12 and 71,627.28

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Solution

The fourth proportional to 128,214.96, 176,937.12 and 71,627.28 is: 98,845.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,214.96 : 176,937.12 = 71,627.28 : x
  2. Step 2: Convert to fraction form
    128,214.96/176,937.12 = 71,627.28/x
  3. Step 3: Cross multiply
    128,214.96x = 176,937.12 × 71,627.28
  4. Step 4: Simplify right side
    128,214.96x = 12,673,524,636.63
  5. Step 5: Solve for x
    x = 12,673,524,636.63/128,214.96
  6. Step 6: Final answer
    x = 98,845.91

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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.