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Finding the Fourth Proportional to 128,049.84, 176,701.64 and 71,464.86

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Solution

The fourth proportional to 128,049.84, 176,701.64 and 71,464.86 is: 98,617.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,049.84 : 176,701.64 = 71,464.86 : x
  2. Step 2: Convert to fraction form
    128,049.84/176,701.64 = 71,464.86/x
  3. Step 3: Cross multiply
    128,049.84x = 176,701.64 × 71,464.86
  4. Step 4: Simplify right side
    128,049.84x = 12,627,957,607.05
  5. Step 5: Solve for x
    x = 12,627,957,607.05/128,049.84
  6. Step 6: Final answer
    x = 98,617.52

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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.