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Finding the Fourth Proportional to 99,402.99, 136,987.16 and 71,059.47

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Solution

The fourth proportional to 99,402.99, 136,987.16 and 71,059.47 is: 97,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,402.99 : 136,987.16 = 71,059.47 : x
  2. Step 2: Convert to fraction form
    99,402.99/136,987.16 = 71,059.47/x
  3. Step 3: Cross multiply
    99,402.99x = 136,987.16 × 71,059.47
  4. Step 4: Simplify right side
    99,402.99x = 9,734,234,986.41
  5. Step 5: Solve for x
    x = 9,734,234,986.41/99,402.99
  6. Step 6: Final answer
    x = 97,926.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.