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Finding the Fourth Proportional to 85,424.90, 128,149.60 and 26,265.54

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Solution

The fourth proportional to 85,424.90, 128,149.60 and 26,265.54 is: 39,402.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,424.90 : 128,149.60 = 26,265.54 : x
  2. Step 2: Convert to fraction form
    85,424.90/128,149.60 = 26,265.54/x
  3. Step 3: Cross multiply
    85,424.90x = 128,149.60 × 26,265.54
  4. Step 4: Simplify right side
    85,424.90x = 3,365,918,444.78
  5. Step 5: Solve for x
    x = 3,365,918,444.78/85,424.90
  6. Step 6: Final answer
    x = 39,402.08

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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.