Home / 85,869.03-128,882.13-43,779.30

Finding the Fourth Proportional to 85,869.03, 128,882.13 and 43,779.30

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Solution

The fourth proportional to 85,869.03, 128,882.13 and 43,779.30 is: 65,709.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,869.03 : 128,882.13 = 43,779.30 : x
  2. Step 2: Convert to fraction form
    85,869.03/128,882.13 = 43,779.30/x
  3. Step 3: Cross multiply
    85,869.03x = 128,882.13 × 43,779.30
  4. Step 4: Simplify right side
    85,869.03x = 5,642,369,433.91
  5. Step 5: Solve for x
    x = 5,642,369,433.91/85,869.03
  6. Step 6: Final answer
    x = 65,709.02

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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.