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Finding the Fourth Proportional to 64,595.70, 89,172.30 and 43,121.70

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Solution

The fourth proportional to 64,595.70, 89,172.30 and 43,121.70 is: 59,528.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,595.70 : 89,172.30 = 43,121.70 : x
  2. Step 2: Convert to fraction form
    64,595.70/89,172.30 = 43,121.70/x
  3. Step 3: Cross multiply
    64,595.70x = 89,172.30 × 43,121.70
  4. Step 4: Simplify right side
    64,595.70x = 3,845,261,168.91
  5. Step 5: Solve for x
    x = 3,845,261,168.91/64,595.70
  6. Step 6: Final answer
    x = 59,528.13

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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.