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Finding the Fourth Proportional to 66,992.96, 92,443.28 and 38,707.76

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Solution

The fourth proportional to 66,992.96, 92,443.28 and 38,707.76 is: 53,412.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,992.96 : 92,443.28 = 38,707.76 : x
  2. Step 2: Convert to fraction form
    66,992.96/92,443.28 = 38,707.76/x
  3. Step 3: Cross multiply
    66,992.96x = 92,443.28 × 38,707.76
  4. Step 4: Simplify right side
    66,992.96x = 3,578,272,295.85
  5. Step 5: Solve for x
    x = 3,578,272,295.85/66,992.96
  6. Step 6: Final answer
    x = 53,412.66

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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.