Home / 83,870.12-115,643.80-66,861.07

Finding the Fourth Proportional to 83,870.12, 115,643.80 and 66,861.07

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Solution

The fourth proportional to 83,870.12, 115,643.80 and 66,861.07 is: 92,190.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,870.12 : 115,643.80 = 66,861.07 : x
  2. Step 2: Convert to fraction form
    83,870.12/115,643.80 = 66,861.07/x
  3. Step 3: Cross multiply
    83,870.12x = 115,643.80 × 66,861.07
  4. Step 4: Simplify right side
    83,870.12x = 7,732,068,001.33
  5. Step 5: Solve for x
    x = 7,732,068,001.33/83,870.12
  6. Step 6: Final answer
    x = 92,190.97

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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.