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Finding the Fourth Proportional to 85,613.40, 128,410.32 and 33,018.48

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Solution

The fourth proportional to 85,613.40, 128,410.32 and 33,018.48 is: 49,523.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,613.40 : 128,410.32 = 33,018.48 : x
  2. Step 2: Convert to fraction form
    85,613.40/128,410.32 = 33,018.48/x
  3. Step 3: Cross multiply
    85,613.40x = 128,410.32 × 33,018.48
  4. Step 4: Simplify right side
    85,613.40x = 4,239,913,582.71
  5. Step 5: Solve for x
    x = 4,239,913,582.71/85,613.40
  6. Step 6: Final answer
    x = 49,523.95

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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.