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Finding the Fourth Proportional to 92,679.32, 138,340.72 and 79,615.64

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Solution

The fourth proportional to 92,679.32, 138,340.72 and 79,615.64 is: 118,840.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,679.32 : 138,340.72 = 79,615.64 : x
  2. Step 2: Convert to fraction form
    92,679.32/138,340.72 = 79,615.64/x
  3. Step 3: Cross multiply
    92,679.32x = 138,340.72 × 79,615.64
  4. Step 4: Simplify right side
    92,679.32x = 11,014,084,960.86
  5. Step 5: Solve for x
    x = 11,014,084,960.86/92,679.32
  6. Step 6: Final answer
    x = 118,840.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.