Home / 387,816.12-581,707.26-121,570.56

Finding the Fourth Proportional to 387,816.12, 581,707.26 and 121,570.56

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Solution

The fourth proportional to 387,816.12, 581,707.26 and 121,570.56 is: 182,350.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,816.12 : 581,707.26 = 121,570.56 : x
  2. Step 2: Convert to fraction form
    387,816.12/581,707.26 = 121,570.56/x
  3. Step 3: Cross multiply
    387,816.12x = 581,707.26 × 121,570.56
  4. Step 4: Simplify right side
    387,816.12x = 70,718,477,354.27
  5. Step 5: Solve for x
    x = 70,718,477,354.27/387,816.12
  6. Step 6: Final answer
    x = 182,350.54

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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.