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Finding the Fourth Proportional to 56,751.81, 78,316.76 and 31,257.69

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Solution

The fourth proportional to 56,751.81, 78,316.76 and 31,257.69 is: 43,135.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,751.81 : 78,316.76 = 31,257.69 : x
  2. Step 2: Convert to fraction form
    56,751.81/78,316.76 = 31,257.69/x
  3. Step 3: Cross multiply
    56,751.81x = 78,316.76 × 31,257.69
  4. Step 4: Simplify right side
    56,751.81x = 2,448,001,084.03
  5. Step 5: Solve for x
    x = 2,448,001,084.03/56,751.81
  6. Step 6: Final answer
    x = 43,135.21

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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.