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Finding the Fourth Proportional to 230,587, 318,214.92 and 129,985

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Solution

The fourth proportional to 230,587, 318,214.92 and 129,985 is: 179,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,587 : 318,214.92 = 129,985 : x
  2. Step 2: Convert to fraction form
    230,587/318,214.92 = 129,985/x
  3. Step 3: Cross multiply
    230,587x = 318,214.92 × 129,985
  4. Step 4: Simplify right side
    230,587x = 41,363,166,376.20
  5. Step 5: Solve for x
    x = 41,363,166,376.20/230,587
  6. Step 6: Final answer
    x = 179,382.04

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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.