Home / 387,112.15-580,667.95-120,895.48

Finding the Fourth Proportional to 387,112.15, 580,667.95 and 120,895.48

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Solution

The fourth proportional to 387,112.15, 580,667.95 and 120,895.48 is: 181,343.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,112.15 : 580,667.95 = 120,895.48 : x
  2. Step 2: Convert to fraction form
    387,112.15/580,667.95 = 120,895.48/x
  3. Step 3: Cross multiply
    387,112.15x = 580,667.95 × 120,895.48
  4. Step 4: Simplify right side
    387,112.15x = 70,200,130,535.87
  5. Step 5: Solve for x
    x = 70,200,130,535.87/387,112.15
  6. Step 6: Final answer
    x = 181,343.13

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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.