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Finding the Fourth Proportional to 86,607.42, 119,424.56 and 75,178.97

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Solution

The fourth proportional to 86,607.42, 119,424.56 and 75,178.97 is: 103,665.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,607.42 : 119,424.56 = 75,178.97 : x
  2. Step 2: Convert to fraction form
    86,607.42/119,424.56 = 75,178.97/x
  3. Step 3: Cross multiply
    86,607.42x = 119,424.56 × 75,178.97
  4. Step 4: Simplify right side
    86,607.42x = 8,978,215,413.50
  5. Step 5: Solve for x
    x = 8,978,215,413.50/86,607.42
  6. Step 6: Final answer
    x = 103,665.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.