Home / 85,140.72-127,711.08-28,986.66

Finding the Fourth Proportional to 85,140.72, 127,711.08 and 28,986.66

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Solution

The fourth proportional to 85,140.72, 127,711.08 and 28,986.66 is: 43,479.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,140.72 : 127,711.08 = 28,986.66 : x
  2. Step 2: Convert to fraction form
    85,140.72/127,711.08 = 28,986.66/x
  3. Step 3: Cross multiply
    85,140.72x = 127,711.08 × 28,986.66
  4. Step 4: Simplify right side
    85,140.72x = 3,701,917,654.19
  5. Step 5: Solve for x
    x = 3,701,917,654.19/85,140.72
  6. Step 6: Final answer
    x = 43,479.99

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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.