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Finding the Fourth Proportional to 86,681.60, 129,800.43 and 59,990.63

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Solution

The fourth proportional to 86,681.60, 129,800.43 and 59,990.63 is: 89,832.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,681.60 : 129,800.43 = 59,990.63 : x
  2. Step 2: Convert to fraction form
    86,681.60/129,800.43 = 59,990.63/x
  3. Step 3: Cross multiply
    86,681.60x = 129,800.43 × 59,990.63
  4. Step 4: Simplify right side
    86,681.60x = 7,786,809,569.97
  5. Step 5: Solve for x
    x = 7,786,809,569.97/86,681.60
  6. Step 6: Final answer
    x = 89,832.32

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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.