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Finding the Fourth Proportional to 258,129.60, 387,165.36 and 89,618.88

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Solution

The fourth proportional to 258,129.60, 387,165.36 and 89,618.88 is: 134,418.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,129.60 : 387,165.36 = 89,618.88 : x
  2. Step 2: Convert to fraction form
    258,129.60/387,165.36 = 89,618.88/x
  3. Step 3: Cross multiply
    258,129.60x = 387,165.36 × 89,618.88
  4. Step 4: Simplify right side
    258,129.60x = 34,697,325,938.00
  5. Step 5: Solve for x
    x = 34,697,325,938.00/258,129.60
  6. Step 6: Final answer
    x = 134,418.24

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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.