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Finding the Fourth Proportional to 72,903.69, 99,950.95 and 71,575.09

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Solution

The fourth proportional to 72,903.69, 99,950.95 and 71,575.09 is: 98,129.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,903.69 : 99,950.95 = 71,575.09 : x
  2. Step 2: Convert to fraction form
    72,903.69/99,950.95 = 71,575.09/x
  3. Step 3: Cross multiply
    72,903.69x = 99,950.95 × 71,575.09
  4. Step 4: Simplify right side
    72,903.69x = 7,153,998,241.84
  5. Step 5: Solve for x
    x = 7,153,998,241.84/72,903.69
  6. Step 6: Final answer
    x = 98,129.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.