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Finding the Fourth Proportional to 101,672.80, 152,509.20 and 90,008.80

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Solution

The fourth proportional to 101,672.80, 152,509.20 and 90,008.80 is: 135,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,672.80 : 152,509.20 = 90,008.80 : x
  2. Step 2: Convert to fraction form
    101,672.80/152,509.20 = 90,008.80/x
  3. Step 3: Cross multiply
    101,672.80x = 152,509.20 × 90,008.80
  4. Step 4: Simplify right side
    101,672.80x = 13,727,170,080.96
  5. Step 5: Solve for x
    x = 13,727,170,080.96/101,672.80
  6. Step 6: Final answer
    x = 135,013.20

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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.