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Finding the Fourth Proportional to 92,899.92, 128,212.80 and 55,174.16

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Solution

The fourth proportional to 92,899.92, 128,212.80 and 55,174.16 is: 76,146.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,899.92 : 128,212.80 = 55,174.16 : x
  2. Step 2: Convert to fraction form
    92,899.92/128,212.80 = 55,174.16/x
  3. Step 3: Cross multiply
    92,899.92x = 128,212.80 × 55,174.16
  4. Step 4: Simplify right side
    92,899.92x = 7,074,033,541.25
  5. Step 5: Solve for x
    x = 7,074,033,541.25/92,899.92
  6. Step 6: Final answer
    x = 76,146.82

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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.