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Finding the Fourth Proportional to 128,151.22, 176,810.04 and 74,425.88

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Solution

The fourth proportional to 128,151.22, 176,810.04 and 74,425.88 is: 102,685.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,151.22 : 176,810.04 = 74,425.88 : x
  2. Step 2: Convert to fraction form
    128,151.22/176,810.04 = 74,425.88/x
  3. Step 3: Cross multiply
    128,151.22x = 176,810.04 × 74,425.88
  4. Step 4: Simplify right side
    128,151.22x = 13,159,242,819.84
  5. Step 5: Solve for x
    x = 13,159,242,819.84/128,151.22
  6. Step 6: Final answer
    x = 102,685.27

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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.