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Finding the Fourth Proportional to 86,014.80, 128,849.40 and 49,035.60

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Solution

The fourth proportional to 86,014.80, 128,849.40 and 49,035.60 is: 73,454.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,014.80 : 128,849.40 = 49,035.60 : x
  2. Step 2: Convert to fraction form
    86,014.80/128,849.40 = 49,035.60/x
  3. Step 3: Cross multiply
    86,014.80x = 128,849.40 × 49,035.60
  4. Step 4: Simplify right side
    86,014.80x = 6,318,207,638.64
  5. Step 5: Solve for x
    x = 6,318,207,638.64/86,014.80
  6. Step 6: Final answer
    x = 73,454.89

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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.