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Finding the Fourth Proportional to 128,351.61, 177,054.12 and 74,630.69

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Solution

The fourth proportional to 128,351.61, 177,054.12 and 74,630.69 is: 102,949.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,351.61 : 177,054.12 = 74,630.69 : x
  2. Step 2: Convert to fraction form
    128,351.61/177,054.12 = 74,630.69/x
  3. Step 3: Cross multiply
    128,351.61x = 177,054.12 × 74,630.69
  4. Step 4: Simplify right side
    128,351.61x = 13,213,670,257.67
  5. Step 5: Solve for x
    x = 13,213,670,257.67/128,351.61
  6. Step 6: Final answer
    x = 102,949.00

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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.