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Finding the Fourth Proportional to 180,639.56, 270,985.74 and 87,068.36

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Solution

The fourth proportional to 180,639.56, 270,985.74 and 87,068.36 is: 130,615.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,639.56 : 270,985.74 = 87,068.36 : x
  2. Step 2: Convert to fraction form
    180,639.56/270,985.74 = 87,068.36/x
  3. Step 3: Cross multiply
    180,639.56x = 270,985.74 × 87,068.36
  4. Step 4: Simplify right side
    180,639.56x = 23,594,283,965.19
  5. Step 5: Solve for x
    x = 23,594,283,965.19/180,639.56
  6. Step 6: Final answer
    x = 130,615.26

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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.