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Finding the Fourth Proportional to 86,533.92, 129,695.76 and 39,722.40

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Solution

The fourth proportional to 86,533.92, 129,695.76 and 39,722.40 is: 59,535.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,533.92 : 129,695.76 = 39,722.40 : x
  2. Step 2: Convert to fraction form
    86,533.92/129,695.76 = 39,722.40/x
  3. Step 3: Cross multiply
    86,533.92x = 129,695.76 × 39,722.40
  4. Step 4: Simplify right side
    86,533.92x = 5,151,826,857.02
  5. Step 5: Solve for x
    x = 5,151,826,857.02/86,533.92
  6. Step 6: Final answer
    x = 59,535.35

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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.