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Finding the Fourth Proportional to 128,339.96, 177,156.03 and 77,354.51

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Solution

The fourth proportional to 128,339.96, 177,156.03 and 77,354.51 is: 106,777.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,339.96 : 177,156.03 = 77,354.51 : x
  2. Step 2: Convert to fraction form
    128,339.96/177,156.03 = 77,354.51/x
  3. Step 3: Cross multiply
    128,339.96x = 177,156.03 × 77,354.51
  4. Step 4: Simplify right side
    128,339.96x = 13,703,817,008.42
  5. Step 5: Solve for x
    x = 13,703,817,008.42/128,339.96
  6. Step 6: Final answer
    x = 106,777.48

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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.