Home / 387,638.02-581,459.46-121,378.06

Finding the Fourth Proportional to 387,638.02, 581,459.46 and 121,378.06

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Solution

The fourth proportional to 387,638.02, 581,459.46 and 121,378.06 is: 182,067.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,638.02 : 581,459.46 = 121,378.06 : x
  2. Step 2: Convert to fraction form
    387,638.02/581,459.46 = 121,378.06/x
  3. Step 3: Cross multiply
    387,638.02x = 581,459.46 × 121,378.06
  4. Step 4: Simplify right side
    387,638.02x = 70,576,421,223.45
  5. Step 5: Solve for x
    x = 70,576,421,223.45/387,638.02
  6. Step 6: Final answer
    x = 182,067.85

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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.