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Finding the Fourth Proportional to 85,408.38, 128,117.25 and 35,493.48

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Solution

The fourth proportional to 85,408.38, 128,117.25 and 35,493.48 is: 53,242.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,408.38 : 128,117.25 = 35,493.48 : x
  2. Step 2: Convert to fraction form
    85,408.38/128,117.25 = 35,493.48/x
  3. Step 3: Cross multiply
    85,408.38x = 128,117.25 × 35,493.48
  4. Step 4: Simplify right side
    85,408.38x = 4,547,327,050.53
  5. Step 5: Solve for x
    x = 4,547,327,050.53/85,408.38
  6. Step 6: Final answer
    x = 53,242.16

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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.