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Finding the Fourth Proportional to 115,006.80, 172,510.20 and 31,900.80

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Solution

The fourth proportional to 115,006.80, 172,510.20 and 31,900.80 is: 47,851.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,006.80 : 172,510.20 = 31,900.80 : x
  2. Step 2: Convert to fraction form
    115,006.80/172,510.20 = 31,900.80/x
  3. Step 3: Cross multiply
    115,006.80x = 172,510.20 × 31,900.80
  4. Step 4: Simplify right side
    115,006.80x = 5,503,213,388.16
  5. Step 5: Solve for x
    x = 5,503,213,388.16/115,006.80
  6. Step 6: Final answer
    x = 47,851.20

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1.5x scale

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.