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Finding the Fourth Proportional to 86,732.80, 130,009.74 and 42,304.66

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Solution

The fourth proportional to 86,732.80, 130,009.74 and 42,304.66 is: 63,413.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,732.80 : 130,009.74 = 42,304.66 : x
  2. Step 2: Convert to fraction form
    86,732.80/130,009.74 = 42,304.66/x
  3. Step 3: Cross multiply
    86,732.80x = 130,009.74 × 42,304.66
  4. Step 4: Simplify right side
    86,732.80x = 5,500,017,847.39
  5. Step 5: Solve for x
    x = 5,500,017,847.39/86,732.80
  6. Step 6: Final answer
    x = 63,413.36

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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.