Home / 172,002.40-258,003.60-78,690.40

Finding the Fourth Proportional to 172,002.40, 258,003.60 and 78,690.40

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Solution

The fourth proportional to 172,002.40, 258,003.60 and 78,690.40 is: 118,035.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,002.40 : 258,003.60 = 78,690.40 : x
  2. Step 2: Convert to fraction form
    172,002.40/258,003.60 = 78,690.40/x
  3. Step 3: Cross multiply
    172,002.40x = 258,003.60 × 78,690.40
  4. Step 4: Simplify right side
    172,002.40x = 20,302,406,485.44
  5. Step 5: Solve for x
    x = 20,302,406,485.44/172,002.40
  6. Step 6: Final answer
    x = 118,035.60

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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.