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Finding the Fourth Proportional to 78,317.92, 108,078.84 and 42,507.94

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Solution

The fourth proportional to 78,317.92, 108,078.84 and 42,507.94 is: 58,661.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,317.92 : 108,078.84 = 42,507.94 : x
  2. Step 2: Convert to fraction form
    78,317.92/108,078.84 = 42,507.94/x
  3. Step 3: Cross multiply
    78,317.92x = 108,078.84 × 42,507.94
  4. Step 4: Simplify right side
    78,317.92x = 4,594,208,845.99
  5. Step 5: Solve for x
    x = 4,594,208,845.99/78,317.92
  6. Step 6: Final answer
    x = 58,661.02

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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.