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Finding the Fourth Proportional to 72,484.58, 108,710.04 and 19,898.30

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Solution

The fourth proportional to 72,484.58, 108,710.04 and 19,898.30 is: 29,842.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,484.58 : 108,710.04 = 19,898.30 : x
  2. Step 2: Convert to fraction form
    72,484.58/108,710.04 = 19,898.30/x
  3. Step 3: Cross multiply
    72,484.58x = 108,710.04 × 19,898.30
  4. Step 4: Simplify right side
    72,484.58x = 2,163,144,988.93
  5. Step 5: Solve for x
    x = 2,163,144,988.93/72,484.58
  6. Step 6: Final answer
    x = 29,842.83

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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.