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Finding the Fourth Proportional to 128,029.30, 176,680.45 and 70,668.64

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Solution

The fourth proportional to 128,029.30, 176,680.45 and 70,668.64 is: 97,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,029.30 : 176,680.45 = 70,668.64 : x
  2. Step 2: Convert to fraction form
    128,029.30/176,680.45 = 70,668.64/x
  3. Step 3: Cross multiply
    128,029.30x = 176,680.45 × 70,668.64
  4. Step 4: Simplify right side
    128,029.30x = 12,485,765,879.34
  5. Step 5: Solve for x
    x = 12,485,765,879.34/128,029.30
  6. Step 6: Final answer
    x = 97,522.72

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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.