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Finding the Fourth Proportional to 101,420.40, 152,130.60 and 99,865.20

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Solution

The fourth proportional to 101,420.40, 152,130.60 and 99,865.20 is: 149,797.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,420.40 : 152,130.60 = 99,865.20 : x
  2. Step 2: Convert to fraction form
    101,420.40/152,130.60 = 99,865.20/x
  3. Step 3: Cross multiply
    101,420.40x = 152,130.60 × 99,865.20
  4. Step 4: Simplify right side
    101,420.40x = 15,192,552,795.12
  5. Step 5: Solve for x
    x = 15,192,552,795.12/101,420.40
  6. Step 6: Final answer
    x = 149,797.80

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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.