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Finding the Fourth Proportional to 78,322.29, 117,335.48 and 60,705.87

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Solution

The fourth proportional to 78,322.29, 117,335.48 and 60,705.87 is: 90,944.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,322.29 : 117,335.48 = 60,705.87 : x
  2. Step 2: Convert to fraction form
    78,322.29/117,335.48 = 60,705.87/x
  3. Step 3: Cross multiply
    78,322.29x = 117,335.48 × 60,705.87
  4. Step 4: Simplify right side
    78,322.29x = 7,122,952,091.74
  5. Step 5: Solve for x
    x = 7,122,952,091.74/78,322.29
  6. Step 6: Final answer
    x = 90,944.12

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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.