Home / 387,831.87-581,730.89-121,586.31

Finding the Fourth Proportional to 387,831.87, 581,730.89 and 121,586.31

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Solution

The fourth proportional to 387,831.87, 581,730.89 and 121,586.31 is: 182,374.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,831.87 : 581,730.89 = 121,586.31 : x
  2. Step 2: Convert to fraction form
    387,831.87/581,730.89 = 121,586.31/x
  3. Step 3: Cross multiply
    387,831.87x = 581,730.89 × 121,586.31
  4. Step 4: Simplify right side
    387,831.87x = 70,730,511,720.18
  5. Step 5: Solve for x
    x = 70,730,511,720.18/387,831.87
  6. Step 6: Final answer
    x = 182,374.16

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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.