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Finding the Fourth Proportional to 85,671.68, 118,237.92 and 47,948

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Solution

The fourth proportional to 85,671.68, 118,237.92 and 47,948 is: 66,174.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,671.68 : 118,237.92 = 47,948 : x
  2. Step 2: Convert to fraction form
    85,671.68/118,237.92 = 47,948/x
  3. Step 3: Cross multiply
    85,671.68x = 118,237.92 × 47,948
  4. Step 4: Simplify right side
    85,671.68x = 5,669,271,788.16
  5. Step 5: Solve for x
    x = 5,669,271,788.16/85,671.68
  6. Step 6: Final answer
    x = 66,174.40

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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.