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Finding the Fourth Proportional to 85,710.96, 128,566.44 and 23,381.28

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Solution

The fourth proportional to 85,710.96, 128,566.44 and 23,381.28 is: 35,071.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,710.96 : 128,566.44 = 23,381.28 : x
  2. Step 2: Convert to fraction form
    85,710.96/128,566.44 = 23,381.28/x
  3. Step 3: Cross multiply
    85,710.96x = 128,566.44 × 23,381.28
  4. Step 4: Simplify right side
    85,710.96x = 3,006,047,932.24
  5. Step 5: Solve for x
    x = 3,006,047,932.24/85,710.96
  6. Step 6: Final answer
    x = 35,071.92

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Similar ratio
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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.