Home / 71,931.12-107,883.69-19,328.31

Finding the Fourth Proportional to 71,931.12, 107,883.69 and 19,328.31

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Solution

The fourth proportional to 71,931.12, 107,883.69 and 19,328.31 is: 28,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,931.12 : 107,883.69 = 19,328.31 : x
  2. Step 2: Convert to fraction form
    71,931.12/107,883.69 = 19,328.31/x
  3. Step 3: Cross multiply
    71,931.12x = 107,883.69 × 19,328.31
  4. Step 4: Simplify right side
    71,931.12x = 2,085,209,404.26
  5. Step 5: Solve for x
    x = 2,085,209,404.26/71,931.12
  6. Step 6: Final answer
    x = 28,988.97

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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.