Home / 387,664.48-581,496.72-121,427.20

Finding the Fourth Proportional to 387,664.48, 581,496.72 and 121,427.20

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Solution

The fourth proportional to 387,664.48, 581,496.72 and 121,427.20 is: 182,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,664.48 : 581,496.72 = 121,427.20 : x
  2. Step 2: Convert to fraction form
    387,664.48/581,496.72 = 121,427.20/x
  3. Step 3: Cross multiply
    387,664.48x = 581,496.72 × 121,427.20
  4. Step 4: Simplify right side
    387,664.48x = 70,609,518,518.78
  5. Step 5: Solve for x
    x = 70,609,518,518.78/387,664.48
  6. Step 6: Final answer
    x = 182,140.80

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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.