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Finding the Fourth Proportional to 78,840.92, 108,808.44 and 48,631.16

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Solution

The fourth proportional to 78,840.92, 108,808.44 and 48,631.16 is: 67,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.92 : 108,808.44 = 48,631.16 : x
  2. Step 2: Convert to fraction form
    78,840.92/108,808.44 = 48,631.16/x
  3. Step 3: Cross multiply
    78,840.92x = 108,808.44 × 48,631.16
  4. Step 4: Simplify right side
    78,840.92x = 5,291,480,654.99
  5. Step 5: Solve for x
    x = 5,291,480,654.99/78,840.92
  6. Step 6: Final answer
    x = 67,115.92

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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.