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Finding the Fourth Proportional to 85,701.76, 128,518.08 and 26,523.52

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Solution

The fourth proportional to 85,701.76, 128,518.08 and 26,523.52 is: 39,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,701.76 : 128,518.08 = 26,523.52 : x
  2. Step 2: Convert to fraction form
    85,701.76/128,518.08 = 26,523.52/x
  3. Step 3: Cross multiply
    85,701.76x = 128,518.08 × 26,523.52
  4. Step 4: Simplify right side
    85,701.76x = 3,408,751,865.24
  5. Step 5: Solve for x
    x = 3,408,751,865.24/85,701.76
  6. Step 6: Final answer
    x = 39,774.58

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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.