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Finding the Fourth Proportional to 76,021.51, 104,909.42 and 42,487.51

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Solution

The fourth proportional to 76,021.51, 104,909.42 and 42,487.51 is: 58,632.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,021.51 : 104,909.42 = 42,487.51 : x
  2. Step 2: Convert to fraction form
    76,021.51/104,909.42 = 42,487.51/x
  3. Step 3: Cross multiply
    76,021.51x = 104,909.42 × 42,487.51
  4. Step 4: Simplify right side
    76,021.51x = 4,457,339,715.96
  5. Step 5: Solve for x
    x = 4,457,339,715.96/76,021.51
  6. Step 6: Final answer
    x = 58,632.61

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1.5x scale

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.