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Finding the Fourth Proportional to 85,673.66, 128,490.74 and 32,371.30

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Solution

The fourth proportional to 85,673.66, 128,490.74 and 32,371.30 is: 48,549.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,673.66 : 128,490.74 = 32,371.30 : x
  2. Step 2: Convert to fraction form
    85,673.66/128,490.74 = 32,371.30/x
  3. Step 3: Cross multiply
    85,673.66x = 128,490.74 × 32,371.30
  4. Step 4: Simplify right side
    85,673.66x = 4,159,412,291.76
  5. Step 5: Solve for x
    x = 4,159,412,291.76/85,673.66
  6. Step 6: Final answer
    x = 48,549.49

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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.