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Finding the Fourth Proportional to 128,256.84, 176,994.30 and 71,668.20

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Solution

The fourth proportional to 128,256.84, 176,994.30 and 71,668.20 is: 98,902.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,256.84 : 176,994.30 = 71,668.20 : x
  2. Step 2: Convert to fraction form
    128,256.84/176,994.30 = 71,668.20/x
  3. Step 3: Cross multiply
    128,256.84x = 176,994.30 × 71,668.20
  4. Step 4: Simplify right side
    128,256.84x = 12,684,862,891.26
  5. Step 5: Solve for x
    x = 12,684,862,891.26/128,256.84
  6. Step 6: Final answer
    x = 98,902.04

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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.