Home / 287,125.43-430,655.31-76,779.77

Finding the Fourth Proportional to 287,125.43, 430,655.31 and 76,779.77

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Solution

The fourth proportional to 287,125.43, 430,655.31 and 76,779.77 is: 115,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,125.43 : 430,655.31 = 76,779.77 : x
  2. Step 2: Convert to fraction form
    287,125.43/430,655.31 = 76,779.77/x
  3. Step 3: Cross multiply
    287,125.43x = 430,655.31 × 76,779.77
  4. Step 4: Simplify right side
    287,125.43x = 33,065,613,497.80
  5. Step 5: Solve for x
    x = 33,065,613,497.80/287,125.43
  6. Step 6: Final answer
    x = 115,160.87

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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.