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Finding the Fourth Proportional to 128,722.60, 177,618.06 and 73,527.88

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Solution

The fourth proportional to 128,722.60, 177,618.06 and 73,527.88 is: 101,457.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.60 : 177,618.06 = 73,527.88 : x
  2. Step 2: Convert to fraction form
    128,722.60/177,618.06 = 73,527.88/x
  3. Step 3: Cross multiply
    128,722.60x = 177,618.06 × 73,527.88
  4. Step 4: Simplify right side
    128,722.60x = 13,059,879,401.51
  5. Step 5: Solve for x
    x = 13,059,879,401.51/128,722.60
  6. Step 6: Final answer
    x = 101,457.55

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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.