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Finding the Fourth Proportional to 91,948.86, 137,825.28 and 52,420.86

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Solution

The fourth proportional to 91,948.86, 137,825.28 and 52,420.86 is: 78,575.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,948.86 : 137,825.28 = 52,420.86 : x
  2. Step 2: Convert to fraction form
    91,948.86/137,825.28 = 52,420.86/x
  3. Step 3: Cross multiply
    91,948.86x = 137,825.28 × 52,420.86
  4. Step 4: Simplify right side
    91,948.86x = 7,224,919,707.34
  5. Step 5: Solve for x
    x = 7,224,919,707.34/91,948.86
  6. Step 6: Final answer
    x = 78,575.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.