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Finding the Fourth Proportional to 153,399.57, 211,756.73 and 103,127.73

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Solution

The fourth proportional to 153,399.57, 211,756.73 and 103,127.73 is: 142,360.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,399.57 : 211,756.73 = 103,127.73 : x
  2. Step 2: Convert to fraction form
    153,399.57/211,756.73 = 103,127.73/x
  3. Step 3: Cross multiply
    153,399.57x = 211,756.73 × 103,127.73
  4. Step 4: Simplify right side
    153,399.57x = 21,837,990,361.48
  5. Step 5: Solve for x
    x = 21,837,990,361.48/153,399.57
  6. Step 6: Final answer
    x = 142,360.18

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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.