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Finding the Fourth Proportional to 128,177.03, 176,869.07 and 77,188.95

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Solution

The fourth proportional to 128,177.03, 176,869.07 and 77,188.95 is: 106,511.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,177.03 : 176,869.07 = 77,188.95 : x
  2. Step 2: Convert to fraction form
    128,177.03/176,869.07 = 77,188.95/x
  3. Step 3: Cross multiply
    128,177.03x = 176,869.07 × 77,188.95
  4. Step 4: Simplify right side
    128,177.03x = 13,652,337,704.29
  5. Step 5: Solve for x
    x = 13,652,337,704.29/128,177.03
  6. Step 6: Final answer
    x = 106,511.58

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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.