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Finding the Fourth Proportional to 85,990.98, 128,847.24 and 52,609.87

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Solution

The fourth proportional to 85,990.98, 128,847.24 and 52,609.87 is: 78,829.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.98 : 128,847.24 = 52,609.87 : x
  2. Step 2: Convert to fraction form
    85,990.98/128,847.24 = 52,609.87/x
  3. Step 3: Cross multiply
    85,990.98x = 128,847.24 × 52,609.87
  4. Step 4: Simplify right side
    85,990.98x = 6,778,636,707.32
  5. Step 5: Solve for x
    x = 6,778,636,707.32/85,990.98
  6. Step 6: Final answer
    x = 78,829.62

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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.