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Finding the Fourth Proportional to 99,710.48, 149,563.28 and 40,531.47

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Solution

The fourth proportional to 99,710.48, 149,563.28 and 40,531.47 is: 60,796.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,710.48 : 149,563.28 = 40,531.47 : x
  2. Step 2: Convert to fraction form
    99,710.48/149,563.28 = 40,531.47/x
  3. Step 3: Cross multiply
    99,710.48x = 149,563.28 × 40,531.47
  4. Step 4: Simplify right side
    99,710.48x = 6,062,019,393.76
  5. Step 5: Solve for x
    x = 6,062,019,393.76/99,710.48
  6. Step 6: Final answer
    x = 60,796.21

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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.