Home / 258,228.90-387,365.66-71,240.40

Finding the Fourth Proportional to 258,228.90, 387,365.66 and 71,240.40

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Solution

The fourth proportional to 258,228.90, 387,365.66 and 71,240.40 is: 106,866.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,228.90 : 387,365.66 = 71,240.40 : x
  2. Step 2: Convert to fraction form
    258,228.90/387,365.66 = 71,240.40/x
  3. Step 3: Cross multiply
    258,228.90x = 387,365.66 × 71,240.40
  4. Step 4: Simplify right side
    258,228.90x = 27,596,084,742.77
  5. Step 5: Solve for x
    x = 27,596,084,742.77/258,228.90
  6. Step 6: Final answer
    x = 106,866.76

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1.5x scale

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.