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Finding the Fourth Proportional to 85,407.96, 128,128.40 and 26,233.12

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Solution

The fourth proportional to 85,407.96, 128,128.40 and 26,233.12 is: 39,354.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,407.96 : 128,128.40 = 26,233.12 : x
  2. Step 2: Convert to fraction form
    85,407.96/128,128.40 = 26,233.12/x
  3. Step 3: Cross multiply
    85,407.96x = 128,128.40 × 26,233.12
  4. Step 4: Simplify right side
    85,407.96x = 3,361,207,692.61
  5. Step 5: Solve for x
    x = 3,361,207,692.61/85,407.96
  6. Step 6: Final answer
    x = 39,354.74

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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.