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Finding the Fourth Proportional to 91,802.86, 126,671.11 and 61,631.98

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Solution

The fourth proportional to 91,802.86, 126,671.11 and 61,631.98 is: 85,040.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,802.86 : 126,671.11 = 61,631.98 : x
  2. Step 2: Convert to fraction form
    91,802.86/126,671.11 = 61,631.98/x
  3. Step 3: Cross multiply
    91,802.86x = 126,671.11 × 61,631.98
  4. Step 4: Simplify right side
    91,802.86x = 7,806,991,318.10
  5. Step 5: Solve for x
    x = 7,806,991,318.10/91,802.86
  6. Step 6: Final answer
    x = 85,040.83

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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.