Home / 104,918.29-157,420.67-76,980.78

Finding the Fourth Proportional to 104,918.29, 157,420.67 and 76,980.78

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Solution

The fourth proportional to 104,918.29, 157,420.67 and 76,980.78 is: 115,502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,918.29 : 157,420.67 = 76,980.78 : x
  2. Step 2: Convert to fraction form
    104,918.29/157,420.67 = 76,980.78/x
  3. Step 3: Cross multiply
    104,918.29x = 157,420.67 × 76,980.78
  4. Step 4: Simplify right side
    104,918.29x = 12,118,365,579.82
  5. Step 5: Solve for x
    x = 12,118,365,579.82/104,918.29
  6. Step 6: Final answer
    x = 115,502.89

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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.