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Finding the Fourth Proportional to 143,090.65, 197,465.85 and 89,406.79

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Solution

The fourth proportional to 143,090.65, 197,465.85 and 89,406.79 is: 123,381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,090.65 : 197,465.85 = 89,406.79 : x
  2. Step 2: Convert to fraction form
    143,090.65/197,465.85 = 89,406.79/x
  3. Step 3: Cross multiply
    143,090.65x = 197,465.85 × 89,406.79
  4. Step 4: Simplify right side
    143,090.65x = 17,654,786,795.79
  5. Step 5: Solve for x
    x = 17,654,786,795.79/143,090.65
  6. Step 6: Final answer
    x = 123,381.84

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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.