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Finding the Fourth Proportional to 85,848.20, 128,781.90 and 26,683.40

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Solution

The fourth proportional to 85,848.20, 128,781.90 and 26,683.40 is: 40,028.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,848.20 : 128,781.90 = 26,683.40 : x
  2. Step 2: Convert to fraction form
    85,848.20/128,781.90 = 26,683.40/x
  3. Step 3: Cross multiply
    85,848.20x = 128,781.90 × 26,683.40
  4. Step 4: Simplify right side
    85,848.20x = 3,436,338,950.46
  5. Step 5: Solve for x
    x = 3,436,338,950.46/85,848.20
  6. Step 6: Final answer
    x = 40,028.08

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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.