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Finding the Fourth Proportional to 258,457.60, 387,699.20 and 134,041.60

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Solution

The fourth proportional to 258,457.60, 387,699.20 and 134,041.60 is: 201,069.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,457.60 : 387,699.20 = 134,041.60 : x
  2. Step 2: Convert to fraction form
    258,457.60/387,699.20 = 134,041.60/x
  3. Step 3: Cross multiply
    258,457.60x = 387,699.20 × 134,041.60
  4. Step 4: Simplify right side
    258,457.60x = 51,967,821,086.72
  5. Step 5: Solve for x
    x = 51,967,821,086.72/258,457.60
  6. Step 6: Final answer
    x = 201,069.04

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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.