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Finding the Fourth Proportional to 128,044.23, 176,712.80 and 70,693.80

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Solution

The fourth proportional to 128,044.23, 176,712.80 and 70,693.80 is: 97,563.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,044.23 : 176,712.80 = 70,693.80 : x
  2. Step 2: Convert to fraction form
    128,044.23/176,712.80 = 70,693.80/x
  3. Step 3: Cross multiply
    128,044.23x = 176,712.80 × 70,693.80
  4. Step 4: Simplify right side
    128,044.23x = 12,492,498,987.17
  5. Step 5: Solve for x
    x = 12,492,498,987.17/128,044.23
  6. Step 6: Final answer
    x = 97,563.94

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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.