Home / 85,587.30-128,381.52-26,421.66

Finding the Fourth Proportional to 85,587.30, 128,381.52 and 26,421.66

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Solution

The fourth proportional to 85,587.30, 128,381.52 and 26,421.66 is: 39,632.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,587.30 : 128,381.52 = 26,421.66 : x
  2. Step 2: Convert to fraction form
    85,587.30/128,381.52 = 26,421.66/x
  3. Step 3: Cross multiply
    85,587.30x = 128,381.52 × 26,421.66
  4. Step 4: Simplify right side
    85,587.30x = 3,392,052,871.72
  5. Step 5: Solve for x
    x = 3,392,052,871.72/85,587.30
  6. Step 6: Final answer
    x = 39,632.67

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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.