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Finding the Fourth Proportional to 71,598.40, 107,389.40 and 19,011.98

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Solution

The fourth proportional to 71,598.40, 107,389.40 and 19,011.98 is: 28,515.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,598.40 : 107,389.40 = 19,011.98 : x
  2. Step 2: Convert to fraction form
    71,598.40/107,389.40 = 19,011.98/x
  3. Step 3: Cross multiply
    71,598.40x = 107,389.40 × 19,011.98
  4. Step 4: Simplify right side
    71,598.40x = 2,041,685,298.43
  5. Step 5: Solve for x
    x = 2,041,685,298.43/71,598.40
  6. Step 6: Final answer
    x = 28,515.80

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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.