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Finding the Fourth Proportional to 85,449.32, 128,173.98 and 55,892.01

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Solution

The fourth proportional to 85,449.32, 128,173.98 and 55,892.01 is: 83,838.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,449.32 : 128,173.98 = 55,892.01 : x
  2. Step 2: Convert to fraction form
    85,449.32/128,173.98 = 55,892.01/x
  3. Step 3: Cross multiply
    85,449.32x = 128,173.98 × 55,892.01
  4. Step 4: Simplify right side
    85,449.32x = 7,163,901,371.90
  5. Step 5: Solve for x
    x = 7,163,901,371.90/85,449.32
  6. Step 6: Final answer
    x = 83,838.02

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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.