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Finding the Fourth Proportional to 86,878.79, 119,891.03 and 48,638.40

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Solution

The fourth proportional to 86,878.79, 119,891.03 and 48,638.40 is: 67,120.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,878.79 : 119,891.03 = 48,638.40 : x
  2. Step 2: Convert to fraction form
    86,878.79/119,891.03 = 48,638.40/x
  3. Step 3: Cross multiply
    86,878.79x = 119,891.03 × 48,638.40
  4. Step 4: Simplify right side
    86,878.79x = 5,831,307,630.36
  5. Step 5: Solve for x
    x = 5,831,307,630.36/86,878.79
  6. Step 6: Final answer
    x = 67,120.04

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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.