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Finding the Fourth Proportional to 70,045.91, 105,124.86 and 36,321.51

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Solution

The fourth proportional to 70,045.91, 105,124.86 and 36,321.51 is: 54,511.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,045.91 : 105,124.86 = 36,321.51 : x
  2. Step 2: Convert to fraction form
    70,045.91/105,124.86 = 36,321.51/x
  3. Step 3: Cross multiply
    70,045.91x = 105,124.86 × 36,321.51
  4. Step 4: Simplify right side
    70,045.91x = 3,818,293,920.26
  5. Step 5: Solve for x
    x = 3,818,293,920.26/70,045.91
  6. Step 6: Final answer
    x = 54,511.31

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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.