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Finding the Fourth Proportional to 86,583.60, 129,875.40 and 85,125.60

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Solution

The fourth proportional to 86,583.60, 129,875.40 and 85,125.60 is: 127,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,583.60 : 129,875.40 = 85,125.60 : x
  2. Step 2: Convert to fraction form
    86,583.60/129,875.40 = 85,125.60/x
  3. Step 3: Cross multiply
    86,583.60x = 129,875.40 × 85,125.60
  4. Step 4: Simplify right side
    86,583.60x = 11,055,721,350.24
  5. Step 5: Solve for x
    x = 11,055,721,350.24/86,583.60
  6. Step 6: Final answer
    x = 127,688.40

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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.