Home / 258,285.48-387,406.35-89,762.55

Finding the Fourth Proportional to 258,285.48, 387,406.35 and 89,762.55

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Solution

The fourth proportional to 258,285.48, 387,406.35 and 89,762.55 is: 134,636.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,285.48 : 387,406.35 = 89,762.55 : x
  2. Step 2: Convert to fraction form
    258,285.48/387,406.35 = 89,762.55/x
  3. Step 3: Cross multiply
    258,285.48x = 387,406.35 × 89,762.55
  4. Step 4: Simplify right side
    258,285.48x = 34,774,581,862.19
  5. Step 5: Solve for x
    x = 34,774,581,862.19/258,285.48
  6. Step 6: Final answer
    x = 134,636.22

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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.