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Finding the Fourth Proportional to 153,405.57, 211,765.01 and 103,133.73

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Solution

The fourth proportional to 153,405.57, 211,765.01 and 103,133.73 is: 142,368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,405.57 : 211,765.01 = 103,133.73 : x
  2. Step 2: Convert to fraction form
    153,405.57/211,765.01 = 103,133.73/x
  3. Step 3: Cross multiply
    153,405.57x = 211,765.01 × 103,133.73
  4. Step 4: Simplify right side
    153,405.57x = 21,840,114,849.12
  5. Step 5: Solve for x
    x = 21,840,114,849.12/153,405.57
  6. Step 6: Final answer
    x = 142,368.46

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1.5x scale

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.