Home / 86,623.60-129,935.40-81,374.80

Finding the Fourth Proportional to 86,623.60, 129,935.40 and 81,374.80

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Solution

The fourth proportional to 86,623.60, 129,935.40 and 81,374.80 is: 122,062.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,623.60 : 129,935.40 = 81,374.80 : x
  2. Step 2: Convert to fraction form
    86,623.60/129,935.40 = 81,374.80/x
  3. Step 3: Cross multiply
    86,623.60x = 129,935.40 × 81,374.80
  4. Step 4: Simplify right side
    86,623.60x = 10,573,467,187.92
  5. Step 5: Solve for x
    x = 10,573,467,187.92/86,623.60
  6. Step 6: Final answer
    x = 122,062.20

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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.