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Finding the Fourth Proportional to 152,077.70, 209,859.45 and 85,009.70

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Solution

The fourth proportional to 152,077.70, 209,859.45 and 85,009.70 is: 117,309.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,077.70 : 209,859.45 = 85,009.70 : x
  2. Step 2: Convert to fraction form
    152,077.70/209,859.45 = 85,009.70/x
  3. Step 3: Cross multiply
    152,077.70x = 209,859.45 × 85,009.70
  4. Step 4: Simplify right side
    152,077.70x = 17,840,088,886.67
  5. Step 5: Solve for x
    x = 17,840,088,886.67/152,077.70
  6. Step 6: Final answer
    x = 117,309.04

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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.