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Finding the Fourth Proportional to 85,955.90, 129,079.25 and 56,021.00

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Solution

The fourth proportional to 85,955.90, 129,079.25 and 56,021.00 is: 84,126.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,955.90 : 129,079.25 = 56,021.00 : x
  2. Step 2: Convert to fraction form
    85,955.90/129,079.25 = 56,021.00/x
  3. Step 3: Cross multiply
    85,955.90x = 129,079.25 × 56,021.00
  4. Step 4: Simplify right side
    85,955.90x = 7,231,147,738.75
  5. Step 5: Solve for x
    x = 7,231,147,738.75/85,955.90
  6. Step 6: Final answer
    x = 84,126.26

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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.