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Finding the Fourth Proportional to 88,135, 121,626.30 and 48,391

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Solution

The fourth proportional to 88,135, 121,626.30 and 48,391 is: 66,779.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,135 : 121,626.30 = 48,391 : x
  2. Step 2: Convert to fraction form
    88,135/121,626.30 = 48,391/x
  3. Step 3: Cross multiply
    88,135x = 121,626.30 × 48,391
  4. Step 4: Simplify right side
    88,135x = 5,885,618,283.30
  5. Step 5: Solve for x
    x = 5,885,618,283.30/88,135
  6. Step 6: Final answer
    x = 66,779.58

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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.