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Finding the Fourth Proportional to 85,114.98, 117,405.45 and 61,203.78

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Solution

The fourth proportional to 85,114.98, 117,405.45 and 61,203.78 is: 84,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,114.98 : 117,405.45 = 61,203.78 : x
  2. Step 2: Convert to fraction form
    85,114.98/117,405.45 = 61,203.78/x
  3. Step 3: Cross multiply
    85,114.98x = 117,405.45 × 61,203.78
  4. Step 4: Simplify right side
    85,114.98x = 7,185,657,332.60
  5. Step 5: Solve for x
    x = 7,185,657,332.60/85,114.98
  6. Step 6: Final answer
    x = 84,422.95

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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.