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Finding the Fourth Proportional to 128,083.01, 176,792.09 and 74,392.16

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Solution

The fourth proportional to 128,083.01, 176,792.09 and 74,392.16 is: 102,682.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,083.01 : 176,792.09 = 74,392.16 : x
  2. Step 2: Convert to fraction form
    128,083.01/176,792.09 = 74,392.16/x
  3. Step 3: Cross multiply
    128,083.01x = 176,792.09 × 74,392.16
  4. Step 4: Simplify right side
    128,083.01x = 13,151,944,190.09
  5. Step 5: Solve for x
    x = 13,151,944,190.09/128,083.01
  6. Step 6: Final answer
    x = 102,682.98

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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.