Home / 85,956.66-129,080.39-56,021.76

Finding the Fourth Proportional to 85,956.66, 129,080.39 and 56,021.76

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Solution

The fourth proportional to 85,956.66, 129,080.39 and 56,021.76 is: 84,127.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,956.66 : 129,080.39 = 56,021.76 : x
  2. Step 2: Convert to fraction form
    85,956.66/129,080.39 = 56,021.76/x
  3. Step 3: Cross multiply
    85,956.66x = 129,080.39 × 56,021.76
  4. Step 4: Simplify right side
    85,956.66x = 7,231,310,349.18
  5. Step 5: Solve for x
    x = 7,231,310,349.18/85,956.66
  6. Step 6: Final answer
    x = 84,127.40

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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.