Home / 258,303.79-387,455.14-71,314.75

Finding the Fourth Proportional to 258,303.79, 387,455.14 and 71,314.75

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Solution

The fourth proportional to 258,303.79, 387,455.14 and 71,314.75 is: 106,971.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,303.79 : 387,455.14 = 71,314.75 : x
  2. Step 2: Convert to fraction form
    258,303.79/387,455.14 = 71,314.75/x
  3. Step 3: Cross multiply
    258,303.79x = 387,455.14 × 71,314.75
  4. Step 4: Simplify right side
    258,303.79x = 27,631,266,445.32
  5. Step 5: Solve for x
    x = 27,631,266,445.32/258,303.79
  6. Step 6: Final answer
    x = 106,971.97

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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.