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Finding the Fourth Proportional to 85,570.87, 128,373.41 and 26,404.31

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Solution

The fourth proportional to 85,570.87, 128,373.41 and 26,404.31 is: 39,611.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,570.87 : 128,373.41 = 26,404.31 : x
  2. Step 2: Convert to fraction form
    85,570.87/128,373.41 = 26,404.31/x
  3. Step 3: Cross multiply
    85,570.87x = 128,373.41 × 26,404.31
  4. Step 4: Simplify right side
    85,570.87x = 3,389,611,313.40
  5. Step 5: Solve for x
    x = 3,389,611,313.40/85,570.87
  6. Step 6: Final answer
    x = 39,611.74

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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.