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Finding the Fourth Proportional to 128,151.54, 176,837.04 and 74,435.18

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Solution

The fourth proportional to 128,151.54, 176,837.04 and 74,435.18 is: 102,713.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,151.54 : 176,837.04 = 74,435.18 : x
  2. Step 2: Convert to fraction form
    128,151.54/176,837.04 = 74,435.18/x
  3. Step 3: Cross multiply
    128,151.54x = 176,837.04 × 74,435.18
  4. Step 4: Simplify right side
    128,151.54x = 13,162,896,018.88
  5. Step 5: Solve for x
    x = 13,162,896,018.88/128,151.54
  6. Step 6: Final answer
    x = 102,713.52

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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.