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Finding the Fourth Proportional to 86,878, 130,318.44 and 34,287.04

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Solution

The fourth proportional to 86,878, 130,318.44 and 34,287.04 is: 51,431.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,878 : 130,318.44 = 34,287.04 : x
  2. Step 2: Convert to fraction form
    86,878/130,318.44 = 34,287.04/x
  3. Step 3: Cross multiply
    86,878x = 130,318.44 × 34,287.04
  4. Step 4: Simplify right side
    86,878x = 4,468,233,565.02
  5. Step 5: Solve for x
    x = 4,468,233,565.02/86,878
  6. Step 6: Final answer
    x = 51,431.13

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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.