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Finding the Fourth Proportional to 85,856.82, 128,784.62 and 26,692.40

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Solution

The fourth proportional to 85,856.82, 128,784.62 and 26,692.40 is: 40,038.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,856.82 : 128,784.62 = 26,692.40 : x
  2. Step 2: Convert to fraction form
    85,856.82/128,784.62 = 26,692.40/x
  3. Step 3: Cross multiply
    85,856.82x = 128,784.62 × 26,692.40
  4. Step 4: Simplify right side
    85,856.82x = 3,437,570,590.89
  5. Step 5: Solve for x
    x = 3,437,570,590.89/85,856.82
  6. Step 6: Final answer
    x = 40,038.41

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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.