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Finding the Fourth Proportional to 109,938.47, 151,718.47 and 62,190.86

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Solution

The fourth proportional to 109,938.47, 151,718.47 and 62,190.86 is: 85,825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,938.47 : 151,718.47 = 62,190.86 : x
  2. Step 2: Convert to fraction form
    109,938.47/151,718.47 = 62,190.86/x
  3. Step 3: Cross multiply
    109,938.47x = 151,718.47 × 62,190.86
  4. Step 4: Simplify right side
    109,938.47x = 9,435,501,213.11
  5. Step 5: Solve for x
    x = 9,435,501,213.11/109,938.47
  6. Step 6: Final answer
    x = 85,825.30

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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.