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Finding the Fourth Proportional to 77,686.80, 116,530.20 and 52,803.60

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Solution

The fourth proportional to 77,686.80, 116,530.20 and 52,803.60 is: 79,205.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,686.80 : 116,530.20 = 52,803.60 : x
  2. Step 2: Convert to fraction form
    77,686.80/116,530.20 = 52,803.60/x
  3. Step 3: Cross multiply
    77,686.80x = 116,530.20 × 52,803.60
  4. Step 4: Simplify right side
    77,686.80x = 6,153,214,068.72
  5. Step 5: Solve for x
    x = 6,153,214,068.72/77,686.80
  6. Step 6: Final answer
    x = 79,205.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.