Home / 309,699.12-464,547.60-85,059.72

Finding the Fourth Proportional to 309,699.12, 464,547.60 and 85,059.72

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Solution

The fourth proportional to 309,699.12, 464,547.60 and 85,059.72 is: 127,589.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,699.12 : 464,547.60 = 85,059.72 : x
  2. Step 2: Convert to fraction form
    309,699.12/464,547.60 = 85,059.72/x
  3. Step 3: Cross multiply
    309,699.12x = 464,547.60 × 85,059.72
  4. Step 4: Simplify right side
    309,699.12x = 39,514,288,782.67
  5. Step 5: Solve for x
    x = 39,514,288,782.67/309,699.12
  6. Step 6: Final answer
    x = 127,589.28

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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.