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Finding the Fourth Proportional to 85,486.74, 128,192.46 and 45,496.08

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Solution

The fourth proportional to 85,486.74, 128,192.46 and 45,496.08 is: 68,224.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,486.74 : 128,192.46 = 45,496.08 : x
  2. Step 2: Convert to fraction form
    85,486.74/128,192.46 = 45,496.08/x
  3. Step 3: Cross multiply
    85,486.74x = 128,192.46 × 45,496.08
  4. Step 4: Simplify right side
    85,486.74x = 5,832,254,436.88
  5. Step 5: Solve for x
    x = 5,832,254,436.88/85,486.74
  6. Step 6: Final answer
    x = 68,224.08

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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.