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Finding the Fourth Proportional to 83,368.80, 115,065.96 and 56,519.94

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Solution

The fourth proportional to 83,368.80, 115,065.96 and 56,519.94 is: 78,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,368.80 : 115,065.96 = 56,519.94 : x
  2. Step 2: Convert to fraction form
    83,368.80/115,065.96 = 56,519.94/x
  3. Step 3: Cross multiply
    83,368.80x = 115,065.96 × 56,519.94
  4. Step 4: Simplify right side
    83,368.80x = 6,503,521,155.24
  5. Step 5: Solve for x
    x = 6,503,521,155.24/83,368.80
  6. Step 6: Final answer
    x = 78,009.05

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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.