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Finding the Fourth Proportional to 56,765.78, 78,307.04 and 43,313.72

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Solution

The fourth proportional to 56,765.78, 78,307.04 and 43,313.72 is: 59,750.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,765.78 : 78,307.04 = 43,313.72 : x
  2. Step 2: Convert to fraction form
    56,765.78/78,307.04 = 43,313.72/x
  3. Step 3: Cross multiply
    56,765.78x = 78,307.04 × 43,313.72
  4. Step 4: Simplify right side
    56,765.78x = 3,391,769,204.59
  5. Step 5: Solve for x
    x = 3,391,769,204.59/56,765.78
  6. Step 6: Final answer
    x = 59,750.24

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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.