Home / 78,490.10-117,725.11-25,886.54

Finding the Fourth Proportional to 78,490.10, 117,725.11 and 25,886.54

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Solution

The fourth proportional to 78,490.10, 117,725.11 and 25,886.54 is: 38,826.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,490.10 : 117,725.11 = 25,886.54 : x
  2. Step 2: Convert to fraction form
    78,490.10/117,725.11 = 25,886.54/x
  3. Step 3: Cross multiply
    78,490.10x = 117,725.11 × 25,886.54
  4. Step 4: Simplify right side
    78,490.10x = 3,047,495,769.02
  5. Step 5: Solve for x
    x = 3,047,495,769.02/78,490.10
  6. Step 6: Final answer
    x = 38,826.50

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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.