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Finding the Fourth Proportional to 92,971.86, 128,300.40 and 50,530.66

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Solution

The fourth proportional to 92,971.86, 128,300.40 and 50,530.66 is: 69,731.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,971.86 : 128,300.40 = 50,530.66 : x
  2. Step 2: Convert to fraction form
    92,971.86/128,300.40 = 50,530.66/x
  3. Step 3: Cross multiply
    92,971.86x = 128,300.40 × 50,530.66
  4. Step 4: Simplify right side
    92,971.86x = 6,483,103,890.26
  5. Step 5: Solve for x
    x = 6,483,103,890.26/92,971.86
  6. Step 6: Final answer
    x = 69,731.89

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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.