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Finding the Fourth Proportional to 158,631.62, 218,909.59 and 90,647.81

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Solution

The fourth proportional to 158,631.62, 218,909.59 and 90,647.81 is: 125,092.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,631.62 : 218,909.59 = 90,647.81 : x
  2. Step 2: Convert to fraction form
    158,631.62/218,909.59 = 90,647.81/x
  3. Step 3: Cross multiply
    158,631.62x = 218,909.59 × 90,647.81
  4. Step 4: Simplify right side
    158,631.62x = 19,843,674,421.24
  5. Step 5: Solve for x
    x = 19,843,674,421.24/158,631.62
  6. Step 6: Final answer
    x = 125,092.81

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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.