Home / 387,918.34-581,878.20-121,699.84

Finding the Fourth Proportional to 387,918.34, 581,878.20 and 121,699.84

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Solution

The fourth proportional to 387,918.34, 581,878.20 and 121,699.84 is: 182,549.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,918.34 : 581,878.20 = 121,699.84 : x
  2. Step 2: Convert to fraction form
    387,918.34/581,878.20 = 121,699.84/x
  3. Step 3: Cross multiply
    387,918.34x = 581,878.20 × 121,699.84
  4. Step 4: Simplify right side
    387,918.34x = 70,814,483,839.49
  5. Step 5: Solve for x
    x = 70,814,483,839.49/387,918.34
  6. Step 6: Final answer
    x = 182,549.98

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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.