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Finding the Fourth Proportional to 66,858.01, 92,210.91 and 56,819.68

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Solution

The fourth proportional to 66,858.01, 92,210.91 and 56,819.68 is: 78,365.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,858.01 : 92,210.91 = 56,819.68 : x
  2. Step 2: Convert to fraction form
    66,858.01/92,210.91 = 56,819.68/x
  3. Step 3: Cross multiply
    66,858.01x = 92,210.91 × 56,819.68
  4. Step 4: Simplify right side
    66,858.01x = 5,239,393,955.11
  5. Step 5: Solve for x
    x = 5,239,393,955.11/66,858.01
  6. Step 6: Final answer
    x = 78,365.99

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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.