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Finding the Fourth Proportional to 71,810.12, 107,715.17 and 19,218.23

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Solution

The fourth proportional to 71,810.12, 107,715.17 and 19,218.23 is: 28,827.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,810.12 : 107,715.17 = 19,218.23 : x
  2. Step 2: Convert to fraction form
    71,810.12/107,715.17 = 19,218.23/x
  3. Step 3: Cross multiply
    71,810.12x = 107,715.17 × 19,218.23
  4. Step 4: Simplify right side
    71,810.12x = 2,070,094,276.88
  5. Step 5: Solve for x
    x = 2,070,094,276.88/71,810.12
  6. Step 6: Final answer
    x = 28,827.34

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1.5x scale

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.