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Finding the Fourth Proportional to 85,279.79, 117,686.57 and 47,040.68

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Solution

The fourth proportional to 85,279.79, 117,686.57 and 47,040.68 is: 64,916.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,279.79 : 117,686.57 = 47,040.68 : x
  2. Step 2: Convert to fraction form
    85,279.79/117,686.57 = 47,040.68/x
  3. Step 3: Cross multiply
    85,279.79x = 117,686.57 × 47,040.68
  4. Step 4: Simplify right side
    85,279.79x = 5,536,055,456.03
  5. Step 5: Solve for x
    x = 5,536,055,456.03/85,279.79
  6. Step 6: Final answer
    x = 64,916.39

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1.5x scale

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.