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Finding the Fourth Proportional to 128,257.04, 176,991.32 and 71,668.88

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Solution

The fourth proportional to 128,257.04, 176,991.32 and 71,668.88 is: 98,901.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,257.04 : 176,991.32 = 71,668.88 : x
  2. Step 2: Convert to fraction form
    128,257.04/176,991.32 = 71,668.88/x
  3. Step 3: Cross multiply
    128,257.04x = 176,991.32 × 71,668.88
  4. Step 4: Simplify right side
    128,257.04x = 12,684,769,674.12
  5. Step 5: Solve for x
    x = 12,684,769,674.12/128,257.04
  6. Step 6: Final answer
    x = 98,901.16

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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.