Home / 85,764.60-128,690.80-40,836.76

Finding the Fourth Proportional to 85,764.60, 128,690.80 and 40,836.76

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Solution

The fourth proportional to 85,764.60, 128,690.80 and 40,836.76 is: 61,276.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,764.60 : 128,690.80 = 40,836.76 : x
  2. Step 2: Convert to fraction form
    85,764.60/128,690.80 = 40,836.76/x
  3. Step 3: Cross multiply
    85,764.60x = 128,690.80 × 40,836.76
  4. Step 4: Simplify right side
    85,764.60x = 5,255,315,313.81
  5. Step 5: Solve for x
    x = 5,255,315,313.81/85,764.60
  6. Step 6: Final answer
    x = 61,276.04

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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.