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Finding the Fourth Proportional to 158,614.72, 218,868.14 and 90,636.10

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Solution

The fourth proportional to 158,614.72, 218,868.14 and 90,636.10 is: 125,066.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,614.72 : 218,868.14 = 90,636.10 : x
  2. Step 2: Convert to fraction form
    158,614.72/218,868.14 = 90,636.10/x
  3. Step 3: Cross multiply
    158,614.72x = 218,868.14 × 90,636.10
  4. Step 4: Simplify right side
    158,614.72x = 19,837,354,623.85
  5. Step 5: Solve for x
    x = 19,837,354,623.85/158,614.72
  6. Step 6: Final answer
    x = 125,066.29

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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.