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Finding the Fourth Proportional to 258,051.60, 387,000.60 and 100,189.20

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Solution

The fourth proportional to 258,051.60, 387,000.60 and 100,189.20 is: 150,253.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,051.60 : 387,000.60 = 100,189.20 : x
  2. Step 2: Convert to fraction form
    258,051.60/387,000.60 = 100,189.20/x
  3. Step 3: Cross multiply
    258,051.60x = 387,000.60 × 100,189.20
  4. Step 4: Simplify right side
    258,051.60x = 38,773,280,513.52
  5. Step 5: Solve for x
    x = 38,773,280,513.52/258,051.60
  6. Step 6: Final answer
    x = 150,253.98

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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.