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Finding the Fourth Proportional to 85,069.80, 117,411.30 and 64,895.40

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Solution

The fourth proportional to 85,069.80, 117,411.30 and 64,895.40 is: 89,567.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,069.80 : 117,411.30 = 64,895.40 : x
  2. Step 2: Convert to fraction form
    85,069.80/117,411.30 = 64,895.40/x
  3. Step 3: Cross multiply
    85,069.80x = 117,411.30 × 64,895.40
  4. Step 4: Simplify right side
    85,069.80x = 7,619,453,278.02
  5. Step 5: Solve for x
    x = 7,619,453,278.02/85,069.80
  6. Step 6: Final answer
    x = 89,567.08

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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.