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Finding the Fourth Proportional to 158,288.91, 218,438.67 and 86,668.92

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Solution

The fourth proportional to 158,288.91, 218,438.67 and 86,668.92 is: 119,603.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,288.91 : 218,438.67 = 86,668.92 : x
  2. Step 2: Convert to fraction form
    158,288.91/218,438.67 = 86,668.92/x
  3. Step 3: Cross multiply
    158,288.91x = 218,438.67 × 86,668.92
  4. Step 4: Simplify right side
    158,288.91x = 18,931,843,615.14
  5. Step 5: Solve for x
    x = 18,931,843,615.14/158,288.91
  6. Step 6: Final answer
    x = 119,603.10

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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.