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Finding the Fourth Proportional to 128,148.21, 176,843.82 and 70,791.48

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Solution

The fourth proportional to 128,148.21, 176,843.82 and 70,791.48 is: 97,691.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,148.21 : 176,843.82 = 70,791.48 : x
  2. Step 2: Convert to fraction form
    128,148.21/176,843.82 = 70,791.48/x
  3. Step 3: Cross multiply
    128,148.21x = 176,843.82 × 70,791.48
  4. Step 4: Simplify right side
    128,148.21x = 12,519,035,746.65
  5. Step 5: Solve for x
    x = 12,519,035,746.65/128,148.21
  6. Step 6: Final answer
    x = 97,691.85

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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.