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Finding the Fourth Proportional to 258,435.60, 387,666.20 and 134,019.60

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Solution

The fourth proportional to 258,435.60, 387,666.20 and 134,019.60 is: 201,036.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,435.60 : 387,666.20 = 134,019.60 : x
  2. Step 2: Convert to fraction form
    258,435.60/387,666.20 = 134,019.60/x
  3. Step 3: Cross multiply
    258,435.60x = 387,666.20 × 134,019.60
  4. Step 4: Simplify right side
    258,435.60x = 51,954,869,057.52
  5. Step 5: Solve for x
    x = 51,954,869,057.52/258,435.60
  6. Step 6: Final answer
    x = 201,036.04

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1.5x scale

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.